Is it better to add 92 or 95 oil to a car?

It should be added according to the requirements of the model, and do not blindly pursue high-grade oil.

There is not much difference between 95 gasoline and 92 gasoline, so it is not necessarily good that 95 gasoline is good. The main difference is the difference in octane number. No. 92 gasoline is rich in 92% isooctane and 8% n-heptane; No. 95 gasoline is rich in 95% of isooctane and 5% of n-heptane, and the octane number of 95 is higher than 92, and the anti-knocking performance is better.

Generally, engines with high compression ratios use high-grade gasoline, and low-grade gasoline is used for low compression ratios. The higher the compression ratio, the higher the power of the car, the worse the stability performance, and the better knock resistance is required.

95 and 92 gasoline are not recommended to be blended.

The short-term mixing of 95 and 92 gasoline will not cause major damage to the car, but mixing gasoline with different labels for a long time will affect the life of the gasoline ignition system, fuel injector and spark plug.

It is better to add 92 oil or 95, depending on which grade of oil your car needs to use, requiring 95 plus 92 is easy to have problems, requiring 92 can add 95, that is, spending more money.

It depends on what kind of car, how big the displacement, etc., it is not a very good car, and it is not good to add 95 oil.

95 oil is a little better. Different gasoline contains isooctane and n-heptane, if the octane number of iso-octane is 100, then the octane number of n-heptane is 0. The proportion of isooctane in No. 92 gasoline is 92%, the proportion of n-heptane is 8%, and the proportion of No. 95 gasoline is 95% and 5%, respectively, and the higher the octane number, the less detonation the gasoline burns.

If it is a high-end car, add No. 95 gasoline, No. 95 gasoline is purer than No. 92 gasoline, and the quality is good, it must be the highest quality.

Gasoline is not necessarily better than 92, only by choosing the right gasoline can really play the role of the engine and not cause harm.

The biggest difference between No. 95 gasoline and No. 92 gasoline is that the content of n-heptane and isooctane is not the same.

No. 92 gasoline is rich in 92% isooctane and 8% n-heptane; Whereas 95 gasoline is rich in 95% isooctane and 5% n-heptane.

1. The piston movement of the cylinder in the engine, gasoline and air will be mixed and compressed in the cylinder, if the pressure is too large, it is easy to detonate. Anti-knock refers to the ability of gasoline to resist knocking when it burns inside the engine, and the anti-knock substance in gasoline is isooctane. The number of 92 or 95 gasoline represents the anti-knock resistance of the fuel, and the larger the number, the greater the isooctane content, indicating the better the anti-knock performance.

2. The type of gasoline used in the car is related to the compression ratio of the engine. The higher the compression ratio, the higher the gasoline grade used. Compression ratio greater than 9:

1. The engine should be filled with gasoline above 90 in principle; For engines with a compression ratio greater than: 1, it is better to use gasoline above 92; When the compression ratio is greater than 10:1, it is best to use gasoline of grade 95 or higher.

Gasoline grade classification:

There are two kinds of motor gasoline in China: leaded and unleaded. The grades are classified according to the research method octane number (RON), and the number in the gasoline grade is the octane number. Whether it is leaded gasoline or unleaded gasoline, the oil grade is divided by the research octane number, as long as the oil grade is the same, its anti-knock performance is the same.

However, leaded gasoline uses tetraethyl lead as antiknock agent, while unleaded gasoline uses unleaded antiknock agent, which has little environmental pollution. With the implementation of new automobile emission control standards, the quality requirements for automobile fuels have changed greatly.

There are 3 gasoline grades in China (IV), namely No. 90, No. 93 and No. 97. Countries (v) are No. 89, No. 92, and No. 95 respectively (No. 98 in the Appendix). The selection of gasoline is mainly based on the requirements of the automobile instruction manual, and the appropriate grade of automotive gasoline is selected on the premise that the engine does not deflagrate under normal conditions.

The traditional emphasis on the relationship between the selection of gasoline according to the compression ratio has become more and more blurred, because the factors affecting the engine deflagration in addition to the compression ratio, there are other factors, and the structure of today's automobile engine is constantly improving, the electronic control system can automatically adjust the ignition advance angle, so that the ignition advance angle of the engine works at the best value, eliminating the detonation.

Whether it is to add 92 or 95 gasoline, it is usually written on the maintenance manual of the car, which is clear, and many cars will also mark it on the fuel tank cap of the car.

The main difference between the two gasolines of 95 and 92 is made according to the different needs of the vehicle, as we all know, 95 will definitely be better than 92 gasoline, so, 95 gasoline is relatively stable, and 95 inside, its gasoline will have more additives, so that its anti-knock performance will be better, and it is especially suitable for some vehicles with high compression ratio, really, so the oil price of 95 is also very expensive.

And there are a lot of high-power, large engines are made of 95 gasoline, because such a large engine with 95 gasoline, it can reduce the vibration of the engine, and let the car as a whole have a better job, so for a high-power car, or 95 gasoline is better, but for some low-power cars, this kind of car can choose 92 gasoline, enough to ensure the stability of the car.

But if you accidentally mix it, it won't have much effect on the engine. Because, the difference between these two gasolines is quite small, but you originally added No. 92, if you add No. 95, it is equivalent to wasting some fuel money, which is actually nothing harmful to the car.

For cars, refueling is essential. Now we can often see 92 gasoline and 95 gasoline on the market, and everyone knows that compared to 92 gasoline, 95 gasoline will be slightly higher. As the saying goes, you get what you pay for.

Hello. This depends on the car.

Some cars can run on 92 gasoline, while some cars can run on 95 gas. What kind of gasoline is used in the car is recorded in the car manual.

2. Excessive conformity with high-grade gasoline.

Nowadays, many people are keen to use high-grade gasoline, and even regard the label as a standard of fuel purity and quality. In fact, the gasoline label only indicates the octane number of gasoline, that is, the knock resistance, and has nothing to do with purity and quality.

For example, if the engine set to No. 92 oil is hard to use No. 95 oil, there will be a phenomenon of "stale combustion", that is, it is not yet the spontaneous ignition point when it is pressed to the head, and the combustion is incomplete, which will cause pollution and waste.

It should also be noted that the gasoline of different grades of the car can not be mixed, and the occasional mixing will not have a big impact on the car, but if it is often mixed, the impact on the car is very serious, especially the car engine, which may face an overhaul of the engine.

5. Precautions.

Cars running on 95 gasoline cannot use 92 gasoline or lower, but cars running on 92 gasoline can use 95 gasoline.

The applicable compression ratio is different, the car with the compression ratio between the 92 gasoline should generally use 92 gasoline, and the car with the compression ratio greater than 95 gasoline should use 95 gasoline; The octane number of No. 93 gasoline is lower than that of No. 95 gasoline, that is, No. 92 gasoline contains 92% of isooctane, while No. 95 gasoline has an octane number of 95%.

Hello, the biggest difference between No. 92 and No. 95 gasoline is that the content of n-heptane and isooctane is different, among them, No. 92 gasoline is rich in 92% iso-octane and 8% n-heptane; Whereas 95 gasoline is rich in 95% isooctane and 5% n-heptane. The gasoline mark also represents the anti-knock performance of the fuel, and the larger the mark, the better the anti-knock performance. It is worth mentioning that the gasoline label has nothing to do with the quality of the gasoline itself, and it does not mean that the higher the gasoline, the better, or that the higher the gasoline does not mean that there are fewer impurities or the purer the purity.

First of all, 92, 95 just represents the octane number of gasoline, theoretically speaking, 95 gasoline octane number is higher, carbon content is higher, burning is indeed more fuel-efficient than 92, but you have to add 95 all the time to experience the characteristics of fuel economy and good power, if you only use it once or twice once in a while, you can't feel it at all.

For some older cars, due to the more carbon deposits in the engine, the volume of the combustion chamber will become smaller, and the compression ratio will become larger, so if you continue to use 92 gasoline, the probability of detonation will be greater, what is detonation? That is, when the engine inhales the oil-air mixture, it <>

The piston compression stroke did not reach the point where it should have been ignited, and for various reasons, it was ignited prematurely, but due to the impact force generated by the gasoline combustion, the direction of the piston movement was opposite.

When they collide together, the engine will vibrate, which is called knocking, and the knocking will reduce the engine power, increase fuel consumption, and make noise louder.

There are many reasons for detonation, such as excessive carbon deposits, which leads to high compression packs, high engine temperatures, and the wrong label for gasoline.

For old cars, switching to 95 gasoline can alleviate detonation, because 95 is better than 92 anti-detonation, old cars plus 95 can not only alleviate detonation, but also reduce fuel consumption, every unit of octane number increases, you can save about 1% of oil, then 95 to 92 can save 3% of gasoline, <>

So is the 95 also better than the 92 for a new car? This is indeed better for some new cars, for example, some turbo models, due to design reasons, the engine will heat up quickly, this is to reach the normal operating temperature faster when the cold car starts, then this engine will use 95 gasoline.

Like Volkswagen's models, although the displacement is small, but it also requires a minimum of 95, if you lower the label and use 92 for a long time, it will lead to a series of problems in the engine.

So if your car is recommended to add 92, there is no problem with using 95, and it will be better, but ** will definitely be a little more expensive, careful friends have not found out.

Many cars have a fuel tank cap that says please use gasoline of 92 and above, and does not say that you can only use 92, or you can add as much fuel as you want.

This depends on your car. If your car is a good car, adding 95 gasoline is good for the fuel tank. If your car is a regular van or a car within 100,000 yuan, it is better to add 92 gasoline.

It will be better to add 95 oil to the car, because the gasoline label of 95 will be higher, the octane number content inside this model gasoline is relatively high, and the anti-knock resistance of this model gasoline will be higher.

It is recommended to add 92 gasoline

92, 95 just represents the octane number of gasoline, theoretically speaking, 95 gasoline octane number is higher, carbon content is higher, burning is indeed more fuel-efficient than 92, but you have to add 95 all the time to experience the characteristics of fuel saving and good power, if you only use it once or twice once in a while, you can't feel it at all.

The car plus 92 or 95 gasoline, after reading the difference, you don't have to worry about it anymore.

The anti-knock performance of No. 95 gasoline is stronger than that of No. 92, and the stronger the anti-knock performance, the greater the ignition advance angle of the engine, and the better the power it shows.

The first criterion for choosing a gasoline grade for a car is the compression ratio of the engine. Normally, the compression ratio of 7 5 8 0 should be used 90 car gasoline; The compression ratio is 8 0 8 5 should be used 90 93 car gasoline; The compression ratio is 8 5 9 5 should be used 93 95 vehicle gasoline; The compression ratio is 9 5 10 should be 95 97 car gasoline.

It refers to the octane number index of gasoline, such as 90, 93, 95, 97, 98, etc., simply put, the higher the value, the higher the anti-explosion ability, to put it bluntly, the higher the value, the more stable the combustion in the engine, the small riot, and the good for the engine.

Blended in different volume ratios, it can be formulated into standard fuels with octane numbers from 0 to 100. The higher the volume percentage of isooctane in the mixture, the better its anti-knock performance.

When measuring the octane number of the sample in the octane number testing machine, the compression ratio is increased until the standard deflagration intensity appears, and then, the compression ratio is kept unchanged, and the standard fuel of a certain composition is selected to be measured under the same test conditions, so that the engine produces a deflagration of the same intensity.

When it is determined that the standard fuel taken happens to be composed of 70% isooctane and 30% n-heptane, the octane number of this test oil can be assessed to be equal to 70. Obviously, 92 petrol is slightly worse than 95. 95 petrol is slightly worse than 97.

Of course, the higher the value, the more expensive the gasoline.

And if you are accustomed to the strength of No. 95 gasoline, after changing to No. 92 gasoline, the driver usually can't help but step on the accelerator deeply, which is why many drivers feel that the fuel consumption of the car has increased after changing to low-grade gasoline. For those cars with turbocharged and high compression ratio engines, with low-grade gasoline, the power will drop more significantly, and there is even the possibility of detonation. Therefore, it is better to add 95 gasoline to these models.

For those cars with naturally aspirated engines with low compression ratios, adding 92 is sufficient. If you want more power when running long distances and high speeds, you can also try the No. 95.