Which gasoline should I cast - 92 or 95? The quality of gasoline. Tips of knowledgeable people

Modern society is almost unthinkable without a personal car. In today's rhythm of life, the machine can save a lot of time. However, in money terms, it consumes, as another member of the family, so the inevitable question is about saving. Most of the costs are fuel, which is consumed in especially large quantities with daily short trips. At 92 petrol price is noticeably lower. Especially if you fill in a whole tank at once. The cost of the 92nd gasoline is from 32 to 37 rubles per liter, the 95th - from 36 to 42 rubles.

It would seem that only three units of the octane number - what's the difference? And the question naturally arises as to which gasoline to pour - 92 or 95? Today we will try to answer this question.

What is a gasoline fuel

There are low-octane gasoline (92nd) and high-octane (95th and 98th). The latter is more resistant to compression and, accordingly, it burns better. In our time, the increase in the octane number is achieved by the addition of additives. And the main criterion of which gasoline to pour - 92 or 95th, depends on the specific car.

Often car owners refuel 92-m at the recommended 95-m, comforting himself with the idea that this gasoline is just a complex of additives. It should be borne in mind that, although it is partially true, the effect gives a set of correct additives that do not harm the motor. If the additives are "wrong", the difference will be felt immediately. First of all, the dynamics of the car, the fuel consumption and the sound of the engine.

92th gasoline instead of 95th

The fuel in the engine ignites from the spark plug. It works a little before the piston reaches the top dead center. At the same time, the fuel mixture in the combustion chamber is compressed. It can itself ignite. In low-octane fuel this happens before. In this case, detonation, explosive combustion of fuel can occur. This is followed by a special sensor. With its help, the ignition timing is adjusted so that this phenomenon does not occur.

However, when working on such a fuel, detonation will still accompany the duty cycle, resulting in damage to the spark plugs, combustion chambers and exhaust manifold. Thus, the difference will be in the reduction of power (in fact, gasoline burns less efficiently) and fuel consumption increase (for the same reason).

Yet the consequences of long operation on low-octane fuel will manifest with time. This is increased wear of the engine and premature failure of the catalytic converter. In it, under certain circumstances, unburned fuel can be burnt. Therefore, the advice in this situation is unequivocal: it is possible to pour 92 instead of 95, but not for long, only as an exception or when there are no other options.

95th petrol instead of 92th

In the reverse situation, there is no optimal effect. Of course, the engine management system will correct the ignition timing. However, this will not be enough, since gasoline with increased OC burns at high temperatures and emits more heat. Engine power will also decrease. Particular engine parts, in particular spark plugs, valves will wear out more.

Actively formed deposits on the pistons and combustion chamber. All this can negatively affect the engine performance and its durability. Earlier on carburetor motors, where there is no knock sensor , an octane-corrector was installed to adjust the ignition timing. But it works only in the direction of lowering the octane number. This was the case with the owners of the Zhiguli, who wanted to ride on the 80th gasoline. And the instructions of cars and motorcycles, which worked on the 76th and 80th gasoline, directly prohibited the work on high-octane fuel in order to avoid deposits on the valves.

Nowadays all these recommendations are relevant. Thus, 95 petrol instead of 92 can be poured, but not recommended. And if it does, then not for long, if necessary. Then, in the presence of the recommended fuel, it is necessary to pour that octane, which is prescribed by the manufacturer.

The difference between the 92nd and 95th gasoline

When considering 92nd and 95th gasoline, the difference in performance will be 2-3 units. For a particular driver, there will be practically no difference. However, this does not mean that 92 instead of 95 can be poured everywhere, for any engines. The difference is insignificant, but with a decrease in the octane number, it is significant. In this case, reduced OCH will lead to an earlier appearance of detonation, which is fatal for any engine. And the fact that the 92 gasoline price is lower is not an excuse.

Is it possible to mix the 92nd and 95th

As already mentioned, different octane numbers characterize the different resistance of the fuel to ignition during compression. Since in our country almost all gasoline is produced in one way - by adding alcohols and ethers - then they will not differ in composition.

When mixing such liquids in any proportion, nothing bad will happen. Differences in the behavior of the car, too, will not be felt. Therefore, you can safely interfere with cheap gasoline from expensive, only it has no meaning.

Features of the 98th

For each engine, there are different fuel usage standards. The manufacturer does not recommend a certain type of it. When using this particular gasoline, the engine's power characteristics will be maximum, with the lowest detonation and specific fuel consumption and maximum output with the maximum resource. 98th is designed for high-powered engines, often turbocharged, with high specific power.

Its increase is caused by an increase in the compression ratio, and therefore the fuel characteristics should be appropriate. For such motors it is very important what kind of gasoline to pour. According to the instructions, they clearly registered the 98th. And for ordinary engines there will be no difference. The engine's power will not grow either (its magnitude does not depend on the octane number of fuel), but in terms of money, the differences will be very significant.

Use of different types of fuel

All engines, as already mentioned, are sharpened for the use of a specific type of gasoline. Gasoline and diesel units have their own production criteria, as well as a class of environmental safety. Often at gas stations there is no certainty that the pistol in the guise of the 95th gasoline is filled precisely by that one, and not by the 92nd. Still there are situations when it is bred with special additives. It on characteristics becomes as gasoline AI-95. But such operations sin small petrol stations, which receive gasoline from unproven producers.

Therefore, the best way to protect yourself from this kind of counterfeiting is to buy fuel at proven gas stations.

Methods of economy

Fuel consumption varies from its octane number, and there is no difference what kind of gasoline to pour - 92 or 95th. When using the "wrong" fuel, the consumption will in any case change, although not much. The engine itself consumes as much as it needs in a particular situation.

And the expense directly depends on the preferred driving style. The greatest economy is achieved with a neat and measured ride, without sudden acceleration and braking. If there is a mechanical gearbox on a dry road, you can use the backwash, neutral transmission. In addition to saving fuel, this style of driving will save the chassis of the car.

However, we note that this method can only be used on "mechanics". износ гидротрансформатора и тормозной ленты трансмиссии. If you have an automatic transmission and you turn on the "neutral" on the move, you will accelerate the wear of the torque converter and the transmission brake belt. Even in traffic jams, it is not recommended to reset the mode to "neutral" if the car is equipped with automatic transmission.

conclusions

Thus, for a car that is recommended to refuel 92nd, which gasoline to pour - 92 or 95th - is clearly understandable. In addition to increasing the flow rate, high-octane liquid will also hit the wallet. And win, in fact, and will not. What kind of gasoline to refuel the car is clearly indicated in the operating instructions. And if you adhere to a quiet style of driving, then the costs will be minimal.