If the marking of gasoline at the refueling does not tell you anything, except for his "number", or if you think that "the more the figure, the better gasoline," it was time to get rid of these delusions. Today we will find out what the number in the marking of gasoline, we will deal with its quality, and also learn whether it will be better to become a car if you pour more expensive fuel.
What do the numbers 92, 95 and 98 mean?
What do the numbers 92, 95 and 98 mean?
ПStanding how to go to the "numbers" of gasoline brands, in two words will deal with the fact that there are different varieties in general, and we will define a couple of key concepts.
The basic principle of motor operation is simple: gasoline and air is supplied to the cylinder, the piston moves up, about at the time of reaching the upper point of the ignition candle, it fuel the fuel mixture, and the combusting fuel pushes the piston down. In this process, it is important that the fuel began to burn on time - when the ignition candle is set on. If the fuel flashes spontaneously before, when the piston is still going up, it harms the motor, destroying it. Therefore, one of the characteristics of any gasoline is Detonation resistance That is, its property is to resist spontaneous ignition. And this detonation resistance depends on octane number Gasoline, which is indicated in its marking: For example, AI-95 has an octane number 95.
The greater the number - the better gasoline?
The greater the number - the better gasoline?
No, different octane number does not mean that 95 gasoline is better than 92: they are just different And created for different motors. Some have a lower compression ratio, and the risk of detonation in them below. Therefore, more low-octane variety is suitable for them - AI-92. In other motors, the degree of compression is higher, or the fuel mixture can be more enriched with oxygen due to the turbine, which simultaneously increases the final compression in the cylinder, and as a result, the risk of detonation is also growing, so such engines require higher octane fuel to avoid it.
So think that "95 gasoline is better than 92" as logical, as it is necessary that "absinthe is better than vodka, because there are 70 degrees against 40." The quality of gasoline by its octane number is not determined: the content of sulfur, manganese, resins and other impurities is set not to the gasoline brand, but by the technical regulations. So that Do not assume that "95 gasoline cleaner and better 92" : The quality of both meets modern fuel requirements and meets current euro standards.
High octane gasoline more useful for the machine
High octane gasoline more useful for the machine
Another misconception associated with gasoline is the opinion that the higher the octane number, the more useful gasoline for the car. It has a truth in it, but in general, the habit of some owners of old cars "pamper them after salary", the Bay of AI-98, deprived of meaning.
Of course, in fact, the processes occurring in the engine is more complicated than simply "fuel injected, burns and ejected", but if you can not delve into the nuances, you can select a key fact: in the conditions of a depleted mixture, high-octane gasoline burns a slightly longer, extinguits later than the specified moment and the It most causes an increase in temperature in the cylinder and overheating adjacent parts - in particular, valves. Simply put, If you pour into the car with a simple atmospheric motor with a low degree of 98 gasoline compression and drive in a calm rhythm, you make a motor only worse - Its use is justified solely if you want to "drive" when the fuel-air mixture has an optimal composition, and high-octane gasoline does benefit, highlighting more energy during combustion.
And here For motors with a high degree of compression or equipped turbine logic "The higher the octane number - the better" is quite justified : and the degree of compression, and the amount of air supplied to the cylinders is sufficient for optimal combustion of high-octane gasoline, and the increase in detonation resistance is only good. At the same time, the decrease in the octane number on the contrary, negatively reflects on the operation of the motor and its resource: the likelihood of detonation increases, which gradually destroys the engine.
Briefly conclusions can be formulated as follows: Machines with low-degree atmospheric motors The use of 98 gasoline is justified only with a very active ride, and in other cases it may even harm, and highly compression engines or turbine are harmful gasoline with an octane number below that is recommended by the manufacturer . That is, for example, the VAZ "seven", whose engine has a compression ratio of 8.5, the high-octane gasoline will not bring a special benefit, but I don't exactly pour 1.2 TSI with a turbine and a compression ratio of 10.5 While AI-98 does not hurt him at all.
On the lid of the gas tank, AKI 91 is written, so I Lew AI-92
On the lid of the gas tank, AKI 91 is written, so I Lew AI-92
Another complexity for inexperienced car owners is different methods for determining the octane number and, accordingly, the differing designations suitable for a gasoline car. The problem here, as a rule, is reduced to the difference between European and American systems.
To speak briefly, the fuel marking systems differ in the octane number: in Europe it is marked by the research method, and in the United States, Canada, Brazil and some other countries - on the "anti-knock index". Actually, our abbreviation Ai is just "automobile" gasoline on the "research" method. But AKI means "Anti-Knock Index", that is, the same "anti-knock index", which is an average arithmetic between the two results of different methods for determining the octane number (research and engine), and its value is obtained below than a pure research method. That is, AKI 91 is not at all the same as AI-92.
The approximate match of our AI and foreign AKI is: AKI 87 is AI-92, AKI 91 is AI-95, and AKI 93 is already AI-98. So, buying a used car, pay attention to what is written on the lid of the gas tank and in the instruction manual, so as not to be mistaken in the choice of fuel.
"Corporate" fuel is better "usual"?
"Corporate" fuel is better "usual"?
Well, perhaps, the last question is related to whether to overpay for "branded" gasoline at large gas stations. It is worth understanding here than the price increases: it is also not an abstract "improvement improvement", but first of all, adding washing additives. Additives These affect the quality of gasoline work in the engine, but on its conditional "purity for the motor", preventing the formation of deposits in the fuel system. But considering that gasoline and itself is quite clean and is an excellent solvent, these conditional deposits do not score the fuel system for the month or year. So the use of branded gasolines with washing additives makes sense, but absolutely not necessarily and does not give a momentum effect, possessing a prophylactic action.
Network gas stations support fashion on high-octane fuel, taking motorists with an increase in power, improving the cost-effectiveness and engine cleaning. Many of those who tried the AI-98 or AI-100 fuel instead of the standard 95th, argue that the car really began to go better, and the costs of expensive gasoline allegedly fought off a noticeable decline in flow. However, experts say that everything is not so unequivocal.
What are these numbers and what is the difference in the price?
From a philistine point of view, the higher the octane number, the fuel is better and more expensive. If the average price of AI-92 in Moscow is now 42.6 rubles. per liter, then the cost of liter AI-95 is 46.9 rubles, and the 98th - already 54.8 rubles. In many refills, the location of the 98th took AI-100, which is often sold more expensive. In addition, the gas stations are the so-called improved grades of the 95th and 98th, which also have a margin of 1-2 rubles.
The octane number of fuel determines its resistance to detonation - the process of too fast combustion of the mixture at which the power unit is experiencing increased loads. The higher the octane number, the slower the mixture of gasoline with air is burning, which allows the engine on peak loads without danger of damage, explains the technical specialist of one of the largest European brands.
"You can make an analogy with the stove. Imagine that there are dry firewood, which light up immediately, and there is wet, which make it slower. When we need to throw a lot of firewood into the furnace, it is better to use wet so that the stove does not explode, "the expert explains.
It is believed that the use of high-octane gasoline allows you to raise dynamic characteristics, increase the power of the engine and the cost-effectiveness of the power unit. The director of the after-sales service department of the Avtospets Center, Igor Serebryakov, even leads impressive figures: "The main advantages of such gasoline are to improve the dynamic exponents of the acceleration of about 7% and the cost effectiveness of the power unit by 6%. However, this concerns only certain engines, an expert adds, and in some cases, on the contrary, it can harm the engine.
That is the 98th in any case better?
The octane number, indicated in the name of the gasoline brand, does not characterize its quality, but only displays detonation resistance, approves the technical director of the aggregator of tech adolescent and evacuation. "Fuel with a smaller octane number is not worse than high-octane. The number necessary for a particular motor is determined by the design features of the engine, first of all - the degree of compression, as well as the ability of the engine control program to compensate for the deviation of the actual octane number from the specified, "expert explains.
In addition, the octane number is not a measure of energy, adds an expert of the European brand: "Any engine turns the chemical energy of fuel into mechanical. The octane number is only indirectly associated with chemical energy, and it is precisely it. The more heat allocates the unit of fuel, the engine more efficiently and more economical.
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At the same time, high-octane fuel is made of low-fusion by adding additives and modifiers and in itself is not more efficient. Moreover, the additives and themselves may be unsuccessful, it insists Denis Golieot: "Some types of additives can form deposits in the engine or adversely affect the neutralization systems of exhaust gases. In particular, that is why the sale of ethyl gasoline is prohibited - tetraethylswisen poisoning catalysts and displays them. Additives based on iron and manganese quickly kill spark plugs. "
Filled 98th, detonation began. What's wrong?
When using high-octane fuel, the engine can really work differently, especially at idle, but it has nothing to do with detonation, the European brand expert is analyzing the question: "The word" detonation "people are trying to describe the uneven engine operation - ignition skipping, increased noise. It can really occur if you use AI-98, because at idle high-octane fuel burning calmer, that is, relatively speaking, worse, and sometimes even ignores the spark. "
In addition, at idle turns at low pressure in the cylinders, the mixture does not have time to move normally, and this is another reason for the deterioration of the combustion process. All these features leave at higher revolutions when the mixture becomes more uniform, starts to burn evenly, and the engine develops full power.
Finally, additives and modifiers, which made fuel raise the octane number, is also not always harmless, and when combustion can settle on candles. "There is little good high-octane gasoline in Russia. Most of these fuels were obtained by the use of additives, the quality of which could be very dubious, "says the expert of the European brand.
What will happen if you pour the 98th in Volga or Zhiguli?
Modern engines are highly functional, so most cars are now calculated on the 95th or 98th gasoline, and they will not be able to work in low-ukatan. But in the case of older engines and expensive fuels, problems may arise, Igor Serebryakov hints.
If the car designers did not assume the use of high-octane fuel, it may harm, an expert of the European brand agrees. For example, such gasoline does not have time to burn during the work stroke tact and continues to burn at open exhaust valves. "Then not only falls efficiency, but also the engine is destroyed. It works at a higher temperature, the risk of exhaust valves and graduation saddles arises, as it happens when translating gas on gas, "explains the specialist.
As an example, it leads the Motor ZMZ-402, which was put on old Volga and at different times was designed for the 66th, 72nd and 80th gasoline: "If you pour a AI-100, I will not travel for a long time , the economy will not be, because most of the fuel will simply fly out into the exhaust pipe. "
And how much will you save?
Increased efficiency in the transition to the 98th or 100th gasoline Denis, the glee considers placebo effect. "A minor increase in efficiency is possible only in those rare cases when the motor is able to realize this difference in the anti-knock properties of fuel. It does not apply to most of the motors of mass passenger cars. And even where it will be possible to reduce the fuel consumption for a couple of percent, the savings will be leveled by a higher cost. At the same time, some risk rushing on the consequences of the added anti-knock additive will be nonzero. "
The European brand expert also claims that savings will occur only if the engine is really designed for high-octane fuel and works more efficiently on it. As an example of such engines, it leads forced versions of Volkswagen turbo engines, the capacity of which can be raised by chip tuning: "For example, a standard 150-strong 1.4 TSI engine on factory tests can produce up to 270 liters. p., and in sports with it more than 300 forces are removed. But only high-octane fuel really allows them to implement them.
But the use of high-octane gasoline does not give any advantages to the use of high-octane gasolines, and even the detergent properties of improved grades of fuel are controversial. "Fuel producers often declared the best detergent of high-octane gasoline. But in fact, the cleansing ability is determined mainly in the composition of gasoline of detergent additives, and they may well be as part of fuel with a low octane number. Fairy tales about great efficiency are also marketing tricks, "continues Denis glee.
What is changing if I have a turbine?
All the same applies to both turbobes that are still more demanding to comply with the manufacturer's recommendations. "In turbocharged engines, it is strictly recommended to fuel the fuel specified by the manufacturer. If the compression ratio is from 10 to 10.5, 95th gasoline is suitable, if above - 98th, "says Igor Serebryakov.
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At the same time, it is necessary to navigate not to the physical degree of compression, but on the effective one, which is considered, taking into account the overpressure created by a turbine or compressor. "And for atmospheric motors, and for engines equipped with a turbocharged or mechanical compressor, the minimum permissible octane number of gasoline is determined. And there, and there can not be used gasoline with a smaller octane number, but it can be with great, "reminds Denis glee.
So what gasoline needs to be poured?
Experts agree that if instead of the 95th gasoline in a modern mass car to pour 98th or "hundredth", then harm it will not cause, but no advantages will most likely not give. Therefore, it is better to pour fuel recommended by the manufacturer, especially given that in 95th fewer modifiers and additives.
The recommended fuel is written on the luch of the gas tank machine. If there are two types of fuel, it means that the brand written in small font, the manufacturer also allows, warning about a possible reduction in operational parameters. "Do not chase the mythical benefits from high-octane gasoline. If you really want to pamper the car with high-quality flammable, refuel the branded varieties that are offered on most network gas stations. They at least stated more detergent additives, "concludes Denis glee.
The automakers themselves do not require improved gasoline in their cars, but sometimes they write in the specifications, which is allowed to use fuel with an octane number, for example, from 95 to 98. But if something like something like "is written" to AI-95 inclusive ", It is not necessary to switch to a more expensive look.
Is it true that 92th gasoline is better than 95th? Or is it worse? What ultimately need to pour into the tank? And why on a vase and Renault-Nissan recommend different grades of fuel for the same motors?
What gasoline is better - low-fledged or high-octane?
Personally, I never had such a question. And not at all because in the past times it was not necessary to choose. Then the people argued except that how it is better to go from the 93rd to the 76th, which some kind of good people were sold to other good people for half a favor, and even cheaper. Unfortunately, when you can fill the tank for a third, or even for a quarter of the price from the state, then all technical arguments are cowardly going to the side.
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The solutions were many. Some then set an additional gasket into the head of the cylinder block, the other changed the rigidity of the spring spring, the third simply moved to later ignition, and the lazy did not change anything at all. But the doubt is that in the native 93rd gasoline "Zhigul" still goes much better than the low-octane caught, no one had. However, what you won't go for substantial savings?
It is curious that today different gasoline is fully, but the disputes did not stop at all. The difference in the claimed octane numbers between the 92nd and 95th is not so big, but the topic does not die. Reasons for praising lower octane - two: all the same desire to save, as well as fear of running on the drained quality of high-octane fuel. The latter circumstance was once generated by rumors that the 95th, they say, "beyond" stronger, but the 92nd make "right." Well, the first, about the cost, alive and today - they say, we are not so rich ... and so on.
Generally speaking, in Europe 92th no longer. But we are not Europe. And any search site is still exploded by hundreds of publications in response to the tsiferki 92 or 95. Well, I will express my personal opinion for the hundredth time. And I apologize to those who do not like it.
About the price. We specifically bring two photos from gas stations - one modern, other six-year old. The cost of liter of the 92nd and 95th was, respectively, 33-70 and 36-70, and earlier - 24-70 and 26-70.
Prices for gasolineThis is a gas station, what she was 6 years ago. The difference in price between the 92nd and 95th - 2 re.
This is a gas station, what she was 6 years ago. The difference in price between the 92nd and 95th - 2 re.
The absolute difference in the price of the liter was 2 rubles, it became 3 (however, somewhere slightly higher). And how much do this delta can be saved at refueling? One hundred rubles? Against the background of the current value of the tank, it seems to me a frivolous reason for anxiety. And those who are going to prove that a hundred rubles is, they say, money, sincerely advise you to change your ride style. I promise you a much more significant financial gain - wrote about it more than once. The same car can "eat" and 7 liters per hundred, and all 15.
Prices for gasolineAnd this is a modern gas station. The difference in prices is 3 rubles.
And this is a modern gas station. The difference in prices is 3 rubles.
Now on the technique. Any motor is calibrated under a certain gasoline variety is a fact. And if the manufacturer wrote: they say, to upload only the 95th, and - neither step aside, then he should be placed. Even if you hold a combination of three fingers in your pocket. On low-fucked gasoline, the machine will go worse (and how can it be otherwise?), But the point is not even in this. Imagine a bad case: there was a problem with the engine, and you came to the service. And there the funny guys first will take a sample of fuel from the tank. And if at least something "not from that opera" will be found, then you can forget about any guarantees. You need it?
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Of course, this is an extreme case. Most modern engines designed under 95th gasoline are swallowed without any problems and 92nd. But I still urge to pour exclusively that gasoline, which is listed in the instructions for your car. If the scatter is specified - another thing: Choose yourself. But if it is not, do not spend laboratory work on your own car. Just post her. Yes, and at the same time.
By the way, all automakers have recently chuckled a little, having started agitation for the 98th gasoline. Say, do not pour down the low-octane 95th, whatever it is written in the instructions. Only 98th in all cars without exception! On this occasion, I have already expressed, and more than once, but the tendency is understandable: you give a high octane! And therefore I repeat once again: in the choice between the 92nd and 95th, I always for the 95th.
However, there are fun and in the fatherland. An interesting observation was recently my former colleague Vadim Crochekov. He was interested in the question of which fuel should be poured into the vazovskiy cars - this is where curious nuances were found out. It turned out that on a vase and Renault-Nissan there is no single approach: the same engine installed on different models, prescribe different grades of fuel.
Quote Vadim. "For Vesti and Xray with the Motor VAZ-21129, A-92 is allowed, and similar motors on the prior, Kalina and grant under the VAZ-21127 index are prescribed only A-95. Or, let's say, the eight-point VAZ-11189 for Largus officially swallows the 92nd, and the same Motor Kalina VAZ-11186 give only the 95th. " And here's another: "Why a 16-valve Motor K4M developing an alliance under the hood Lada Largus requires A-95, and in Almers, Logan and Sandero can work on A-91? Moreover, Renault even admits short-term operation on gasoline with octane number 87 by research method. There is no such variety in Russia, but the tank can get the poor-quality 92th, with which the motor can somehow cope. "
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In short, the engineers did not agree with each other, in which saint must be ordinous. Previously, a certain unity of views reigned on the same vase: they say, 95 - and that's it. Arguments Simple: At the same time, we promise you environmental friendliness plus economy plus pickupness, etc. There was a spare argument: this is the so-called technological stock laid by the designer on any "if"! In other words, if somewhere, "not in our area", as Comrade Sahaov, you still nalled the 95th, and something worse, then nothing happens to your engine. But as soon as we allow the 92nd, then we will take responsibility for any 87th ... and who needs it?
Today, it seems to me, developing engines under 92th does not make sense. If only because, as I said, there are no more such tsiferok in Europe. The lower modern limit is the 95th. As for modern and previously released cars, I repeat again: I - for the 95th.
Even if the automaker allows the variation of octane.What gasoline is better - 92nd or 95th?
Is it true that 92th gasoline is better than 95th? Or is it worse? What ultimately need to pour into the tank? And why on a vase and Renault-Nissan recommend different grades of fuel for the same motors?What gasoline is better - 92nd or 95th?
What is better to pour into the tank 92 or 95 gasoline we understand which gasoline is better
As it became clear, almost all disputes are focused on the fact that gasoline AI-92 can be used as permissible and it is no worse than AI-95. To verify this version, we conducted an experiment with fuel on the two most popular models of cars purchased lately. They became Nissan Almera and Chevrolet Cobalt.
A real road test site was chosen for the experiment, since on general use roads to achieve the same motion regimes is very difficult. And this means that the results obtained will be incorrect and incorrect.
As for laboratory studies, we immediately refused them, since we are interested in the results obtained under normal conditions. And that is why we go to the landfill, in order to pass the next circles, alternating uniform movement.
To begin with, we got acquainted with the instructions of the manufacturers of Nissan Almers, which recommend pouring into the car of the car and the 92nd, and the 95th, and the 98th brand of gasoline. As for more specific information, it will not be able to receive her buyer, since it is simply no. But the official dealer of the representative office dispelled. It turns out that the results of the measurements specified in the instructions were carried out precisely on the 92nd gasoline. It turns out that it is its manufacturers of Nissan Almers consider the optimal version of fuel for the engine of this car.
As for Chevrolet Cobalt, the manufacturer allows the use of gasoline with a practical any octane number. The main condition is that the fuel is not unleaded. In addition, in the instructions, we also found a warning that the use of fuel with octane number below 91th significantly worsens the characteristics when driving.
We decided to carry out an experiment as follows: Pour the same gasoline into both tanks and go until any car stops.
Gasoline also buy from the same proven manufacturer and at one refueling.
The result of the ride showed the following: with gasoline AI-95 Almera, in 454 km spent the 50-liter tank completely. After carrying out simple mathematical calculations, we receive consumption per 100 km, which is equal to 11.01 l / 100 km.
Now Chevrolet Cobalt. With his six-speed gear, he was surprisingly voracious Nissan, who is endowed with a 4-speed gearbox. The result of Chevrolet Cobalt - 432 kilometers past. It turns out 11.57 l / 100 km.
Now the check-in is repeated, but instead of AI-95 use gasoline 92nd. The results forced us a lot of surprise. 10.66 l / 100 km from Nissan and 10.94 l / 100 km from Chevrolet. It turned out that the cheapest type of gasoline was better? Some kind of paradox! Amazing discrepancy with theory.
Now check the AI-98. Maybe this type of gasoline is most economical? Pour it into the sedans of the budget class, of course, is not an option, but you can. So, expenses turned out to be the lowest: on Nissan Almers - 10.53 l / 100 km, and on Chevrolet Cobalt - 10.64 l / 100 km. The results on this brand of gasoline did not show any deviations, but with fuel of low brands, on the contrary, everything is strange.
What to do? "Spank" everything on the gas station, allegedly, gasoline was poor quality or confused at refueling with stamps. We went to refuel into another gas station, no less well-known. Filled the canisters so that everything was exactly and flooded in the tanks. And what happened. Nissan Almers 10.34 l / 100 km from AI-92 and 10.35 l / 100 km from AI-95. Chevrolet cobalt 10.2 l / 100 km from AI-92 and 10.28 l / 100 km from AI-95. Already better. Although, if you have in mind the measurement errors, the fuel consumption on both fuels is almost the same. And again no savings of gasoline with a high octane number does not give. This is imperceptible in either liters or in money (which is much more exemplary).
We checked gasoline with a different octane number of only two cars, but it already gives a clear understanding that gasoline AI-92 pour more profitable. And we think that this conclusion will be fair for a large number of cars, where the manufacturer allows fuel to fuel into the tank with such an octane number. Why, asks, overpay, if the low cost can be filled with the fuel of the same quality?
How to independently determine the quality of gasoline
The quality of gasoline of a particular brand can be determined by its shade. So, a good high-quality fuel should be transparent or have a light yellowish tint. Occasionally, some fuel grades are in their composition of certain foreign impurities, which can cause turbidity of fuel. By the way, the presence of a federal smell of sulfur in the composition of benzine of foreign substances may indicate.
Some drivers define the quality of fuel depending on the degree of fluid evaporation. So, to check the gasoline in such a way, you should take a sheet of white paper and drop a drop of fuel on it. If after evaporating the sheet remains white, it indicates a sufficiently high quality of gasoline. Poor fuel leaves a noticeable stain on paper, and sometimes fat traces.
When there is no paper at hand, you can drop fuel on your hand and wait a little bit. High quality gasoline without extraneous impurities dries almost instantly. If the stain is broken and an oily trail was formed on the skin, this suggests that foreign substances are included in the fuel.
The resin content in gasoline Experienced motorists are determined using convex glass. You should drop the liquid to the surface and set fire to it. If after such actions on the glass clearly visible circles of a brown shade, then such gasoline is better not to use. In the case when the remains after burning gasoline are white, the quality of the fuel is at a fairly high level.
To understand whether fuel is not diluted with fuel, you can spend another experiment. You should pour a small amount of gasoline into transparent dishes and add a bit of manganese potassium or a stale from a regular pencil. If the shade of fuel has changed from a transparent or yellowish color to pink or purple, use such fuel to refuel the car, extremely undesirable.
When conducting any experiments with fuel, you should always remember the safety technique. The treatment of flammable must be extremely careful. It should be carried out all the above experiments from open fire and explosive substances.
Recommendations of automakers
Adhere to the recommendations that the manufacturer of your car indicated in the operating manual is definitely necessary, but not everyone has this leadership, it is especially concerning bu-cars which more than 10-15 years
In addition, as we have already said, if you are recommended by the 95th but you see and hear that the car goes better on the 92nd, moreover, if you take into account the fact of "smashing" fuel at refueling, then I think that in this situation can be moved from rules
If you pursue another goal, for example, savings, and pour the 92th knowing that the manufacturer of your car clearly indicated that it is necessary to refill 95th only because it is cheaper, then you should think about what. The fact is that the higher the octane number, the lower the ignition temperature of gasoline. Consequently, refueling the 92nd you may not be suspected to increase the temperature of the fuel ignition that in itself is not good, since the details that are temperature-dependent (pistons, valves, gaskets, glands can be found from a higher temperature regime. etc.). From one or two fasters I think nothing will happen, but if it goes into the habit and you will consciously pour my 92nd, then how not to twist unscheduled repair work on the restoration of the engine or its individual parts are guaranteed. That is why if for your car, the 95th pouring into the tank 92th is urgently not recommended, at least it is about regular refueling.
What is modern gasoline
Modern types of gasolines are made on other technologies, and they are not as before. I used to 30 years old, the only type of manufacture was only one - the direct distillation method. If you go, this is something like a moonshine apparatus, only instead of "Braga", the raw oil was poured and the light factions were first, it was gasoline. Then kerosene and the most severe fraction - diesel.
From this method, it has long been refused, the thing is that with this production, the octane number was obtained only 50-60 units. You need to add a lot of additives to bring the final product to the desired Pts, at least to Ai 76 - 80! Yes, and the additives used to be used on Tetraethylswinse, etc., they are very effective, but very harmful to humans and the environment.
Now everything has changed, the direct distillation method is practically not used, the refineries are updated and now the main method is a different kind of cracking - thermal, catalytic, etc. (We will not deepen, I already have an article - how gasoline do, who is interested to read).
Here, the essence of a little different oil here with pressure, temperatures are unfolded as it were to layers, and the topmost layer - gasoline is drained. Pluses such methods a lot:
- This is greater point - about 80 - 85 units. And ideally you need to get rid of additives
- From liter oil turns out more gasoline
But 80 - 85 units for a modern motor very little! You need at least 92 or 95.
But additives that were used earlier - are prohibited now! Again, only ether and alcohols are considered to be allowed at the moment. It is they practically do not apply the environment and man harm (such norms are recommended to us through the "Euro" standards).
But alcohols and esters having a high Pts (approximately 113 - 130), they will not be lit as fast as I would like! Here we come to the most interesting
Types of gasoline
There are several types of gasoline, which differ from each other detonation properties. Detonation is the process of rapid combustion in the working fluid chamber, resulting in the formation of shock waves. If the driver heard a characteristic sharp knock - it means that the engine detonation process occurred. The detonation resistance of gasoline depends on the octane number. Depending on the percentage of isochastane, it will become clear on which gasoline is better riding. The higher the percentage of isocutane, the higher the resistance of detonation.
Gasolines containing a high percentage of octane can be obtained using two methods: an increase in the high-octane components in the production process, and with the help of a tetraethylswin gasoline. The first way is more complicated, the second is simpler and cheap. In the first case, neeethydrated gasoline is obtained, in the second case - eaten. Tetraethylsvinets increases the detonation resistance of gasoline. In the CIS countries today produce the following types of gasoline:
Gasoline can be: ethyl, low-ethylene, unleaded. They are also produced for use in summer and winter periods.
Ethyl gasolines are painted in different colors. For example, A-72 has a pink color, A-76 stained in yellow, AI-93 has a red-orange shade, AI-98 tinted with a blue. Abroad, mainly use the Gasoline of the Premium brand, which refers to the first grade, he has an octane number of 98-98 and the gasoline of the "regulator" - it refers to the second grade and has an octane number of 90-94. Some countries produce "super" gasoline, whose octane number is 99-102. If the car is foreign production, it is better to use gasoline with an octane number of 91-92, for the models of the release of the 90s, gasoline must contain an octane number of at least 94.
Unfortunately, at different gas stations, the quality of gasoline is different. Therefore, it is better to refuel your car on proven gas stations, and it is desirable that the same dealer is. Many drivers are trying to figure out which gasoline is better in winter, but no matter how paradoxically, some prefer to refuel the gasoline of the brand 92, others - 95. It is in winter that it often depends on the type of gasoline whether the car will be able to start. Some drivers do not see a tangible difference between the brands of gasoline 92 and 95. But, ideally,, of course, should win the gasoline of the A-95 brand. Experts recommend using gasoline AI-95 in winter time, especially for those machines that "overnight" in the open sky.
Fors major on the road
Sometimes there may be such a situation on the road at which several kilometers left to the nearest settlement, and gasoline ended. In this case, it is reasonably wondering, and what to pour instead of gasoline? To the information of skeptics, the car is able to go through everything that burns, even if you fill alcohol into the tank, and the higher the degree, the better.
From alcohol, the most suitable flammable is pure medical alcohol or vodka, but it must be pre-evaporated. Methyl and ethyl alcohols can also be used as fuel.
An excellent option for refueling the car of the car will be kerosene, which will allow the car to accelerate. Butane and propane can also be used in the form of fuel. You should not forget that after the replacement of gasoline, other combustible, the car may need to be repaired.
Now you know everything about how to choose the right gasoline! We wish you good luck on the road!
Normal flammable front
Any gasoline, under any type of fuel, there is a normal flamm of ignition. Usually he fluctuates around 10 to 30 m / s. With properly selected fuel, the entire potential of mechanical and thermal energy is used as much as possible, the OBS works can be said with the maximum efficiency and its resource is not reduced.
The flare of ignition depends on various parameters, such as: - octane number (OC), compression ratio, ignition (now it can be electronically or analog), fuel supply (carburetor or injector).
Ideally, for each engine design, recommended fuel is selected. It was especially important on analog carburetor engines (after all, the ignition could not automatically adapt), in contrast, it is modern "injection" units, where the electronics itself can delerate everything, based on various sensors (detonation, lambda probes, etc.)
What gasoline is better to pour 92, 95, 98
What gasoline refueling and what kind of gasoline is better to pour? 92th or 95th, and maybe the 98th? And on what gas stations? These issues are worried about both newcomers, and quite already experienced motorists who were convinced and felt the difference in the behavior of a car on a different gasoline from different gas stations.
Good gasoline is a real gasoline! Just him, unfortunately, we lacked with us ... According to statistics, most part of the ordinary motorist holds on urban roads and country tracks within 100 km. From the city, which makes it possible to refuel on one or two proven gas stations. This is a very important point and immediately after purchasing a car, we recommend that you find a search for such refills in your city and its surroundings. In this, of course, the Internet will help you. Read reviews, ask forums and be sure to find a good gas station. Be doubly alert in case your car eats diesel fuel. With the quality of diesel in our country, the situation is even worse than with gasoline and fly to expensive repairs - easier than simple.
So, the refill is chosen, the reviews on the Internet say that it is good and gasoline (diesel) on it quality. Now let's define what gasoline is better to fill the car, with diesel and it is understandable - the choice is small. Well, gasoline: 92nd, 95th, and maybe at once the 98th? It is the opinion that it is better to refuel the 92nd, because in it there are fewer additives and it is cleaner, and after the 95th, the Nagar appears, the candles and other unpleasant consequences are blushing. But supporters of this point of view, as a rule, do not take into account that moment that our 92nd is nothing more than the 80th ... You can break your shirt for a long time and try to prove something, but the fact remains a fact. This confirmation may be numerous fuel experts from various gas stations throughout Russia, the results of which suggest that the octane number is far from all cases corresponds to the claimed brand of gasoline. It is already difficult to argue with this.
So thus, what gasoline is pouring? First of all, study the instructions on your car on this topic or simply open the gas tank hatch, it may be written there a gasoline brand that needs to be poured. If only 95 is written, then there is nothing to think here and do not try to deceive the designers, deciding to save, pouring the 92nd. If the instruction allows us to use the 92nd, then it is to solve you. Harm from the fact that you will pour 95th instead of the 92nd there will be no. Consumption will be smaller, the dynamics may noticeably change for the better, when the engine is running in the limit modes (riding on high revs, sharp accelerations, etc.) its wear will be less. On the money approximately it will come out, except for the repair of the engine ... it is still necessary to take into account the moment that the 92nd gasoline in Russia is currently the most common, according to its probability, as they say, "disengagement" is also higher than that 95th.
Let's summarize and once again we will list actions that will help provide your car with high-quality fuel, thereby save you nervous cells:
- We read reviews, we are looking for information about refueling, choose convenient location.
- We make a choice in favor of the 95th gasoline. If interesting, then experiment with both, go in different modes and check on your skin ????
- We try to always refuel at one or two verified gas stations.
- If it happened so that gasoline inquired inquiry got into the tank and the car began to behave strangely, then we dilute it with 5-10 liters of 98 and try to visit a hundred.
Couple on the topic of gasoline:
Whether valve or pistons will not rugging
These horrors came to us from old carburetor cars. Where often there were only two types of gasoline 76 and 93. And pour 93 to the motor with 76 was not recommended! Why? Yes, because the carburetor could not adjust the automatically "octane number", and it turned out that the mixture is still on the cylinders, but the flared valve opens and pay for this flame!
Yes, it was real, but if you adjust the carburetor to use the fuel of a high "octane", then nothing terrible will not happen.
Modern machines, often already allow the use of all types of fuel, in the instructions for use, you can see such inscriptions:
- From 91 to 99
- Not less than 92.
- At least 95.
- 95 recommended, but it is possible to 98
Etc. What it says to us, yes, that often modern motors can work almost on all modern standards. If we say to your car, it is recommended at least 92th that it says that you can pour all types and 92, 95, 98.
If the car is calculated for 95, then you can pour 95, 98. But if you fill 92 and detonation will go, the ignition angle immediately adjusts the "detonation sensor" it is precisely for this.
That is, modern motors, in the literal sense of the word - smart! Relying on a bunch of ECU sensors will take the right solution and launch the desired algorithm with this type of fuel.
So - nothing will be prohibited or the valve, nor the more pistons.
The most common misconceptions about fuel
Almost every modern gas station, in addition to conventional fuels, has in its range also so-called, improved options under different names: Mustang, V-Power, Ventus, etc. Naturally, the cost of such a fuel is different from the price of ordinary gasoline.
As far as the purchase of more expensive fuels will be an appropriately ordinary driver to figure out is not so simple. In principle, there are various opinions on this, among which there are several popular myths about the combustion. They will make it possible to deal with what gasoline is better refueling.
More expensive fuel consumes more economical. Yes, such a statement is true. The decrease in fuel consumption is achieved due to the high anti-knock sustainability of expensive gasoline
However, such a savings are not too significant - only 5%. It is known that fuel consumption to a greater extent depends on the manner of driving the driver itself and changing it, it is possible to reduce the fuel consumption of up to 30%, refueling the auto-95-98 auto gasoline.
The quality of diesel fuel is not too important for the car engine. This statement is erroneously, as sulfur, part of diesel fuel, is harmful to diesel engines
Therefore, the lower the quality of the diesel engine, the more negative there will be its effect on the motor and the fuel system.
The car will not work if you fill it with poor, low-quality flammable. In principle, it is possible that the car will ride even after it refueling any fuel liquid - for example, solvent. However, such a trip will be quite short, and the cost of subsequent repairs will significantly reduce the budget of the owner of the car.
Thus, it suggests that the most suitable for refueling the car is the type of fuel, which is recommended by the manufacturer directly for a particular machine.
In addition, the owners of the car should be remembered that the main indicator of the fuel quality is the operation of the machine. The sound of the engine, exhaust gases, the dizziness on the road - these properties will tell the owner of the car on how correctly his choice of fuel was. Therefore, it is better to decide which gasoline only the consumer itself, because it is he who is responsible for the safety of his car.
Testing 92 and 95th
Begin. In order for the tests to be honest and correct, first make sure that the claimed octane number of fuel corresponds to reality. And, in connection with this, gasoline, which bought on a well-known gas station was sent to an independent examination. This verdict was made by experts - in the canister with 92m, one hundred percent "ninety-second" was filled, and in another capacity, the detonation fuel resistance was 94.9. This insignificant non-owner in the form of one tenth will not affect the purity of the experiment.
For tests, VAZ-21103 was chosen - AvtoVAZ obliges the owners of this model to refuel AI-95, and 92Y put "out of law". However, this prescription is not all followed - out of ten "one hundred thirds", from the strength, the high-octane fuel will ask for a couple. But let's talk about it a little later.
A standard test program was chosen, that is, the Corsis measuring instrument was recorded accelerating dynamics of the machine, the maximum speed and exercise on the elasticity of the engine operating on gasoline AI-92 and AI-95. Finally, fuel expenditures were compared - for this, the fuel cell was connected to the fuel line. The difference in behavior is easier and easier to understand, to catch in the steady motion modes - when working on the fifth gear at speeds of 60, 90 and 120 km / h.
What gasoline refueling needs to know any motorist
Therefore, the question, which gasoline to fill the car, is worried not only by novice motorists, but also more experienced drivers sometimes make it difficult to determine all the pros and cons of gasoline of different brands.
The number matters?
It would seem that there is something to think, you need to refuel with gasoline, corresponding to the technical characteristics of the machine, and no problems, and doubt.
- But those for whom the issues of savings are important, are asked if it is impossible to refuel AI-92 gasoline, the car that should work on AI-95, after all, the 92th is much cheaper than the 95th,
- Other motorists for which issues of savings are not relevant, sometimes believe that since the 95th is a higher octane number, the engine on the 95th will work more efficiently than 92, although 92 is intended for their cars,
- And maybe in general, refuel the 98th gasoline, as it is better fuel, it means that the car will like it.
Use AI-95, instead of AI -92
And yet, what brand give preference, 95 or 92? Such a question should not stand in front of the car enthusiast, as any gasoline should be used in that car for which it is intended. Look in the description of your "friend's car", which "feeding to him to taste", or you can look at the Luke of a gas tank, sometimes they write gasoline brand on it. And use the one that is intended for your car.
Consider all the pros and cons of replacement to the "best" fuel:
- Rose dynamics,
- Will reduce fuel consumption,
This, of course, pluses, but there are cons:
- Some components of the DVS are faster, specifically, spark plugs and valves will be faster,
- Nagar on the pistons and in the combustion chamber will grow faster, so the engine will most likely fail.
But these minuses will only be important if you constantly use the 95th, instead of the 92nd. Sometimes situations happen when there is no possibility to use the "correct" gasoline. In this case, you can refuel 95th, one-two-time use of another fuel is safe for engine operation.
Replace the 95th 92th. Is it possible?
If, if necessary, you can still replace the 92nd, 95th, then it is categorically not recommended to do. Here are what trouble will be your "iron horse" with this replacement:
- The engine power will decrease, since gasoline will burn slower,
- Fuel consumption will increase due to slowing its combustion,
- Detonation will be observed in the engine,
- The engine will work with voltage,
- The dynamics will be reduced, the motor will not cope with the stated speed.
Constantly refueling the machine that should work on the 95th 92th, which means to reduce the duration of the operation of the engine (internal combustion engine) and the engine replacement was inevitable before the deadline.
Using gasoline AI-98
Among some motorists sometimes there is an opinion that it is best to refuel the car of the AI-98 brand gasoline, the octane number of it is higher, it means that the motor will work better. This is the root of incorrect opinion, as this fuel is designed for highly functional engines with a greater degree of compression and is not at all intended for machines operating at 92 or 95th. It is possible to pour it only when low-quality gasoline fell into the tank and the motor refuses to work. You can add 5-7 liters of the 98th, the operation of the motor will improve significantly. But later, if fuel doubted fuel in the benzobak, it is recommended to visit the service station and make diagnostics and cleaning the engine and the fuel system.
Conclusion how gasoline refuel
So, what gasoline to fill the car, this question cannot have several interpretations. Each engine is designed to work with a certain type of fuel, the volume of its chamber corresponds to a certain octane number of gasoline, the fact that is indicated in the operational characteristics, and refueling the gasoline of another brand means to significantly reduce the life of your "iron friend".
How to make gasoline
All car owners have to call for gas stations and "feed" their "iron horse". Diesel motors and gasoline can be installed on cars. Consider gasoline engines, or rather the fuel on which they work - gasoline. Many, probably heard of truck drivers who were interested in what a diesel fuel on gas station, summer or winter. In winter, in a strong frost, summer diesel fuel can turn into a viscous substance, and the motor will not be able to work. Gasoline can also be summer and winter.
Unlike a diesel fuel, the summer grade of gasoline does not thicken with a strong frost. But different varieties of gasolines have different properties. To sort out this, consider how gasoline is produced. Gasolines of different brands are obtained from crude oil by adding different additives in them, which are designed to improve the quality of fuel.
There are several types of oil refining, in which gasoline is obtained. The easiest way to get gasoline from crude oil is a straight distillation. The process of something resembles the receipt of a moonshine from the Braga. Only in this case the "moonshine apparatus" for distillation of oil is structurally more complex.
Oil is mined at different fields, its composition may differ, which affects the yield of gasoline during processing. With primary distillation at the outlet, approximately 20-30% of gasoline from the volume of oil depending on its variety. This is the main disadvantage of this method of refining oil. Gasoline obtained in this way is used as basic. It is used as the basis and stirred with gasoline obtained with a different method of production.
Another way to produce gasoline from oil is cracking. With this process of oil refining, special catalysts are used. At the output, high-octane gasoline is obtained. But there are more severe fractions in their composition than in the primary distillation gasoline. Many oil refineries receive gasoline in two ways and then mix them to obtain the necessary properties of the final product.
Many motorists argue about what gasoline pour into his car. Will it overpay for 95 5-10% and if you can upload 92, then you can not save me. But let's try to understand what possible consequences can be. What are the pros and cons.
The choice between A95 and A92 gasoline is a fairly common problem for motorists. It is associated with fuel quality and constant rise in price. Since the price difference is about 5-10%, while refueling A92 it turns out a significant difference. But, taking such a decision, it is worth examining the advantages and disadvantages, pay attention to possible consequences.
What fuel should be used?
In the operation manual, each car indicates recommendations for refueling a certain kind of fuel. They must be observed, especially when the car is under warranty. Since the development of malfunctions associated with low fuel quality will lead to expensive recovery at the expense of the owner.
To figure out which gasoline pour 92 or 95, you need to understand what the numbers mean and how they affect the properties of the working fluid. 92, 95 are octane numbers that determine the detonation fuel resistance. The increase in the indicator is accompanied by a decrease in the likelihood of self-ignition during compression. Special studies are conducted to determine the characteristics.
Eyes - a research octane number that allows you to understand how the fuel will operate with minimal and average loads; OPC - a motor number defining at elevated loads, respectively, displays the permissible level of loads in harsh conditions, when moving uphill (this number is below the eyes and for 92th is 92, and for 95th - 95). Selecting gasoline, it is worth considering and important moments of production:
As a result of a direct distillation of oil, a working substance with rather low properties is obtained, where very varies in the range of 42 - 58. For obtaining the desired indicators, a hydrocracking system is used when special additives that improve the operation of the composition are added.
There is another technique where the product is obtained immediately with the desired characteristics. This is a catalytic reforming system, but its application involves high costs and a higher cost of fuel. Therefore, the scheme is used in the West, we have only a small part of the products in this way.
The fineness of the choice of the best fuel
Thinking what gasoline is better than 92 or 95, it is worth considering the opinions of specialists and the features of the design of the machine, engine. Paying attention to the octane number, it can be noted that the difference is very small.
How does the car behave while refueling A92: with a significant increase in revolutions, the quality of movement is reduced; fuel consumption will increase slightly; Power will fall. When choosing a95:
Dynamic indicators are impaired - for overclocking up to 100 km per hour, it will be necessary for 1 second less; fuel consumption will practically change; the car moves smaller and more confident;
The disadvantage of the 95th fuel is the accelerated wear of the spark plugs, which is determined by the increased additive content. The disadvantage of the 92nd is the likelihood of detonation, since the octane number is lower. It should be noted here that new power plants are designed to consider the detonation sensor to eliminate unpleasant situations.
What happens when you refuel A92 instead of A95? Each engine is designed to work with a specific fuel, as calibration is performed. Especially acute fuel change is felt on new cars, where, to increase the potential and reduce consumption, the manufacturer increases the compression ratio in the cylinders.
When refueling low-quality fuel should be expected:
Self-ignition when driving at elevated loads. The substitutes are dangerous to the destruction of the rings, roast the pistons, gaskets. But this is only theoretical side, since the machines are equipped with a detonation sensor. After all, automakers are aware of the quality of fuel, and that it is difficult to find a good fuel outside of Europe. The effect of detonation sensors allows the use of fuel with lower patches without harm to the motor.
Therefore, when doubts arise - whether it is possible to pour 92 gasoline instead of 95, the answer will be positive. Since the controller constantly monitors the mechanical oscillations of the power plant, sending the corresponding signals of the ECU. When the testimony exceeds the norm, the ignition angle is corrected. But for machines with a carburetor, a fuel change must be accompanied by setting the appropriate angle by the experimental method. Automatic adjustment is assumed only for the injector.
The detonation sensor is effective with small and medium loads. At maximum capacity, performance decreases, which is accompanied by an increase in danger. Consequently, refueling the 92nd, you need to stick to a moderate ride style.
The difference between different types of gasoline octane number is the main answer to the question than is different than 92 gasoline from 95. The required indicators are achieved by adding additives.
What additives are used:
Substances where metal-containing products are performed as the basis. Among them are tetraethylswin, which is dangerous for the motor and the exhaust system. During the combustion, compounds are formed leading to a rapid failure of a catalyst, an oxygen sensor. Such fuel is considered obsolete, although it provides the most efficient operation of the aggregate. Monomethilaniline-based attacks, nickel, manganese. They are considered safer, environmentally friendly, distinguished high. Mixing with the products of oil distillation, allow you to get the desired indicators. However, in the process of operation, form a raid on the elements of the motor and the outlet system, which leads to blockage. Esphira and alcohols are the most advanced additives, although they have not high enough. They are also rather aggressive, therefore their content is limited to 15%.
When choosing suitable fuel, it is important to follow the instructions of the car manufacturer. The effectiveness of the entire system depends on this. The environmental indicator is also important. If the motor is designed in accordance with the norms of Euro 2, the use of more eco-friendly fuel is not appropriate, will not bring due results. But the refueling of a modern motor is low-quality flammable will lead to failure. If the question arises - is it possible to mix gasoline 95 and 92, it is worth paying attention to different density and octane number. As a result of mixing fuel with less density, that is, A92, go down, at the same time A95 will rise up. Therefore, the noticeable improvement in the dynamics will not happen, this applies to savings.
What gas station is worth refueling? Choosing a good refueling provides the use of high-quality fuel that does not harm the car and will comply with the manufacturer's requirements. Thinking on what gas stations the highest quality gasoline should consider the selection criteria.
What to pay attention to:
The quality of gasoline. It is determined not only by the composition of fuel, but also storage conditions, transportation. The work of employees who should eliminate the contamination of the product are also to eliminate. The price is an important factor where lowered or overestimated indicators are alarming. Too low cost is usually associated with quality. Owning is often accompanied by a proposal of better fuel. But in practice, only a small part of such a fuel corresponds to the declared characteristics. The presentation of GOST or TU. Information about gasoline can be clarified at refueling. If the refusal is received - it is worth thinking about the quality of the products offered. Service, additional services, shares, bonuses - facts that attract customers. Combined with good fuels, it raises the gas station rating. Spending good fuel, stand out:
Tatneft, where the hard control of the products offered is provided. Fahedon - the quality of the fuel may differ depending on the party, but remains at the height. Squate - offers excellent fuel and good service. .Shell is an international network where you can fill an environmentally friendly, highly efficient fuel, fully justifying your price.
Among other networks worthy of attention should be noted - Gazpromneft, LUKOIL.
The quality of the products offered at different gas stations may vary, but following the selection criteria, you can always determine a good gas station.
Want to know which brand gasoline is better to pour into the car? It is understandable because the case is not the first. Today, most drivers are demanding about the quality of fuel, especially if the car is new and long-awaited. This is not a Soviet Union, when the brands were once or two and did it. However, not until the end of having understood in the topic, often behave, as in the proverb: "Make a fool of Brit to pray, he and forehead broke." In other words, harm the car, passionately wanting to benefit.
The most common false beliefs:
- The higher the octane number - the better for the motor;
- If you can fill AI 92, then 98 will definitely suit. And 100 for any car in general, a dream;
- And, on the contrary, instead of Ai 95, you can pour 92. Think, one position difference;
- On gas station from large producers, gasoline is always more expensive;
- On cheap fuel can and need to save;
- Brand fuel - myth and trick of marketers in order to contempt with consumers more money;
- Gasoline of one brand at all refills is the same.
As you understand, all of the above does not correspond to reality. Found their own beliefs in the list? If yes, you better read the material below!
What gasoline is better to pour in the car?
We offer to familiarize yourself with 5 tips that will help you understand what gasoline is better to pour into your car, and also, what can not be categorically!
1. We read the technical guide!
Take the instruction manual for your car and find information there, the gasoline of which brand it is better to fill.
Each engine is calibrated under a certain fuel brand (it does not matter gasoline or diesel). It is under it that the mechanic of the unit is configured. It is with her who knows the electronic control unit. Remember, only with the recommended fuel brand will show the best power and dynamics. If you regularly pour "someone else's" fuel, over time the engine will begin to give failures: overheating, premature wear, increased gasoline consumption, increasing carbon on internal elements, early catalyst clogging, etc.
Of course, if one day you had to refuel Ai 92 instead of AI 95, nothing terrible would happen. But, it is better not to get involved.
2. Each engine is its octane number
Octane number is detonation stability in the motor. It is his numbers after the letters of AI in the designation of the brand. The lower, the faster in the inner combustion chamber there is ignition from the spark. Accordingly, the longest detonation process produces gasoline AI 98, the fastest - AI 80.
Each motor is configured to a specific cycle in which detonation should occur on time. That is why if the engine is designed for high-octane gasoline, it is impossible to pour low-octane. And, on the contrary, by the way. The octane number is raised by adding special additives from alcohols and ether to fuel. They significantly affect the cost of the final product. Therefore, AI 98 and more expensive AI 92, and not at all due to the miraculousness of its composition.
Remember the main thing! High-octane is not at all synonymous with the word "high quality". Do not think that, refueling the fuel of a more expensive brand, you indulge with a wheelbarrow "Caloric Delicacy". The correct metaphor here is rather - "feed the dog with freshly joined hay."
Well, and if you fill the fuel cheaper brand, do not wait for the economy. When the engine challenges, you will understand.
3. Compare prices correctly
It is quite logical, before you go off the fill in gasoline, reject the relevant prices. Open websites-aggregators of refueling (type of Yandex refueling) and check where the fuel is more expensive today, and where cheaper. But it is only necessary to compare, following the two principles:
- Branded gas stations with each other. Minor networks and single refills, respectively, with each other;
- Compare prices for the same stamps (AI 92 C AI 92, etc.) and branded fuel with branded.
As for the last rule, we have already explained higher (why brands with a large octane number are more expensive). In relation to the first, let's say this: Eminate manufacturers of gasoline can afford a little throw value. But they guarantee the quality of their fuel, its environmental friendliness and lack of metal-containing and other harmful additives.
With regard to small refueling networks - make a decision yourself. If you trust - you can pour. Doubt - better not. Especially, we do not recommend refueling on gas stations, branded colors or names of which deliberately echoes with any famous brand. Too much "Chinese" reception, right?
4. List of reliable gas stations
So, proven manufacturers are a guarantee of gasoline quality, without chemistry, toxic additives and dishonest tricks.
Gasoline What brands is considered the best in Russia? Check out the list:
5. Brand fuel - rather yes, what is not
It is performed in compliance with the ideal equilibrium of chemical components, and also contains a complex of useful additives - detergents that improve friction impeding corrosion. Numerous tests have proven the effectiveness of such gasoline. They really improve the power and dynamics of the car, make exhaust more environmentally friendly, affect the inner parts of the engine and the fuel system.
However, it is worth such gasoline more. But it's better than usual!
By the way, the premium fuel in the tank is acute, no. However, the car, and ecology, will be grateful to you!
Situating the above, they will reply, finally, which brand of gasoline is better than all. The path to a successful choice is simple. Choosing which brand gasoline is better to pour into the car, follow the only rule. Leite is the one that is recommended for the engine of your machine, with the desired octane number, filled with a proven manufacturer. Perhaps with the "branded" or "eco-friendly" marking. But this is not so important.
Well, and the best price is on such fuel, pick themselves.
Internet to help you!
How truthful is the judgment that the 92nd gasoline is better than the 95th? Is it possible to mix different grades of fuel? Why in VAZ and Renault-Nissan recommendations for the same engine indicate different gasoline stamps? And what is still pouring into the tank to save?
Surprisingly, how many questions appear in the head from the Russian motorist, when he once again thinks about the increase in fuel prices. Yes, life is becoming more expensive, but I don't want to transplanted on public transport, so the idea of the possible use of low-octane gasoline visits us more and more.
So, what gasoline to fill: 92th or 95th?
To figure out which gasoline is better to fill in the car: 92th or 95th, - you first need to understand what is an octane number (OC) and what it affects. Of course, famous drivers know this and without a libreatic, but beginners will be useful to read it.
ATTENTION: Octane number (Other name - detonation resistance) is a parameter that determines the ability of fuel to withstand the process of self-ignition during compression in the combustion chamber of the motor. This means that the higher the very, the later gasoline is ignited and the more effective is its combustion.
In turn, any motor is designed for a certain degree of compression. For example, VAZ engines have a compression ratio of 9.0 or 9.9. In the instructions for cars equipped with these engines, it is indicated that the recommended gasoline brand is 92th. What does it say about? And about the fact that in this power unit, the 92nd gasoline will not be able to self-splash. It will light only from the spark when the car will be completely ready for this.
If the self-ignition of gasoline occurs prematurely, it leads to overheating of the motor, its accelerated wear and even some breakdowns. Therefore, manufacturers always indicate which fuel brands are allowed to fill a specific car.
Is it possible to pour 95th or 98th gasoline instead of the 92nd?
What gasoline to pour into the tank, designed for the 92nd grade? Experts believe that it is permissible to refuel any of the 92nd and higher.
Everything is logical: if we pour fuel to the tank with a higher octane number, we reduce the likelihood of detonation in the cylinder, and this is an indisputable plus for the motor. Thus, we reduce the risk of breakage.
It is quite expected that at the 95th or 98th gasoline, the car will go smoothly and will be able to develop greater power, because fuel in the chamber will burn with a large efficiency. At the same time, the car normally can start consuming a little less fuel. However, there should be no significant difference in the behavior of the car and costs for gasoline. Moreover, if, for example, the car is designed for 92th gasoline with a compression ratio of up to 10.5, then the application of the 95th brand can lead to some power loss.
Many motorists are confident that the use of the 95th and 98th gasoline instead of the 92nd will lead to the brave of cylinders. Perhaps in old cars it was, since their engines could not adapt to the change in the octane number. Modern cars are supplied with special electronic blocks, designed to adjust the engine mode in accordance with the quality of the fuel incense.
But: The electronic unit (ECU) has specific ranges of work, so it is better not to risk and not "jump" through the brand. That is, if your car runs on the passport on 92th gasoline, it is not necessary to pour in it "weaving", enough of the 95th.
Is it possible to pour 92th gasoline instead of the 95th?
What gasoline pour into the car if the 95th registered instructions, but I really want to save? Alas, only the 95th. You do not want to fail if you fail in warranty repair?
It is necessary to fill a car with a fierce with lower Pts, and it will begin to "Caprip": to make molding sounds resembling the knob of the valves. This indicates detonation processes occurring inside the engine. Another sign of detonation - when the engine continues to work when you have already turned off the ignition. Good in this case do not have to wait.
To avoid serious breakdowns and expensive repairs, it is desirable to drain low-fledged gasoline from the tank as early as possible and fill the car with fuel, fully relevant to the manufacturer's recommendations. If the breakage after all the same happens, the service center will quickly understand what happened. In this case, all repair work you will have to do at your own expense.
If the ECU has, negative consequences are minimized, but then you will significantly lose in power. Does it make sense in such savings?!
Is it possible to mix 92nd and 95th gasoline?
Choosing which gasoline is better to fill, some are forced to mix two stamps at once. For example, to get used to the residues of the 95th canister of the 92nd. What does it work out and can it be done?
Some believe that when mixing two "diversity" brands, a certain averaged type of gasoline will be obtained. In practice, this does not happen. The lighter 95th gasoline is completely rising above the 92nd. It turns out that each fraction is consumed separately and no practical benefit from such an experiment will be able to receive.
It is necessary to understand that if when mixed, you use gasoline with a lower octane number than prescribed in the instructions, you at least risk obtaining increased wear of the motor (see the previous section).
Why octane number is not all
In principle, the filling of the car - the case is extremely simple: drove on the gas station; paid for litter on the desired column; Walked down until the ordered fuel flows into the tank, and drove on his affairs.
But ... we are in Russia, where the quality of fuel often leaves much to be desired. Even if you know exactly what gasoline needs to be poured into your car, you are not insured against the purchase of low-quality fuel. For a long time it was even believed that the 92nd gasoline is much better than the 95th. It was the opinion that the 95th is strongly diluted with us, so it would be cheaper and more correct to refuel the 92nd. Now the quality of fuel in large cities is more or less complied with the stated characteristics, although the risk to run into the unfair seller is still there.
Probably, you came across refueling, where they sell AI-100. Some are parting such places by the party, others are buying "weaving", because it is supposedly cool. In fact, they usually pay mad money for the most ordinary 98th gasoline, just a slightly "discerning".
And the secret is that. Many do not even guess that the quality of fuel is not determined by one, but at once two indicators:
• Pts on the research method;
• Pts on the engine method.
The first indicator is the most octane number that is displayed in the name of the gasoline brand. It is determined when testing on small revolutions. The second indicator was obtained at high speed. Despite the fact that it is not indicated in the name of the brand, it is of great importance.
So: if you want to request information on the same AI-100, with a large share of probability it turns out that very much on the engine method does not exceed 88. And this means that you buy the usual 98th gasoline, but at a vigorous price. Well, what gasoline is better to pour: AI-100 with a motor number 88 or AI-98 with a motor number 90? Yes, yes, and the latter meets, you just need to look carefully.
In addition, it is important to correctly understand the connection between the octane number and capacity of the car. Many people think that if they decide their "Zhiguli" by 98th gasoline, then their "swallow" will fly the arrow. In fact, the situation is as follows: a more powerful car requires fuel with a higher octane number, but high-octane gasoline itself will not turn the OKU in Ferrari.
So, what gasoline is better to pour into the tank?
With positive and negative consequences arising from refueling the car with non-standard gasoline, we got acquainted. It is believed that all modern cars require gasoline not lower than AI-95, but AI-92 is often recommended with a compression ratio to 10.
Manufacturers always indicate the accompanying documents, which gasoline is better to pour into a particular car. Ideally, you need to clearly follow these recommendations. Often, manufacturers indicate not one, but at once two permissible fuel grades. This means that you can refuel your car with any allowed brand. However, if we consider that there is a risk of acquiring low-quality gasoline, it is better to use fuel with a higher octane number.
What if the manufacturers do not have a single opinion about the gasoline brand?
So, in order to understand what gasoline to pour into the tank of his iron horse, it is enough to open the documents and find the fuel recommendations there. By the way, and on the taste of the filling neck, this information usually also is.
But what if two plants recommend different gasoline for the same motor? For example, it is not necessary to go far. Our native priors, vanity and grants equipped with the engine VAZ-21127, on the recommendation of the plant should work exclusively on the 95th gasoline. The same motor, which in Vesta and Xray wears the VAZ-21129 index, is ready to have the 92nd brand. Why does this happen?
It must be said that such inconsistency is characteristic of many alliances. Just different engineers look different on fuel. For example, at VAZ, specialists are reflected in this way: "95th gasoline is more eco. The whole world goes to more eco-friendly fuel, so we are exactly on the right track. In addition, if the tank under the guise of the 95th will fill the 92nd, the car will not notice this. Another thing, if we write the 92nd in the documentation, and the driver will be trapped in the 80th instead, - then it will be bad ... "
Use 95th gasoline instead of the 92nd today has become normal, because in Europe 92th went into the past, and our country is not far from this. Modern vehicles All of the polls require fuel from the 95th brand and above. In the extreme case, the plant specifies the spread from 92nd to the 95th.
So, what gasoline is better to pour into the tank of your car, you solve yourself. After all, in case of mistake, all responsibility lies only on you. But more correctly, it would still be to follow the recommendations of the manufacturer and refuel only on proven gas stations.