Recently, I found a question about refueling we are more concerned about, and that is: say cars are more prone to carbon deposition, adding that a more fuel-grade gasoline is not the quality of the oil the better, cleaner, more resistance to burn it? To understand this question, I'll give you a detailed explanation of the owner under the following five aspects.

1. What grade of gasoline in the end is?

92, 95 and 98 means that the gasoline octane, octane gasoline contains a substance, called isooctane, the things we can easily understand, is gasoline "sedative" the fuel grade, in fact, the proportion of iso-octane gasoline, 92 gasoline is 92?so-octane. In other words, the greater the numerical designations, the greater the proportion of iso-octane, gasoline is that it's "sedative" in fact means that the larger the numbers, the more stable gasoline, the more difficult the knocking in the engine cylinder .

I summarize: the higher the grade, the higher antiknock; the lower the grade, the lower the antiknock.

2. Why did you grade of gasoline?

Because there is a parameter of the engine, the compression ratio is, in fact, is compressed to reach a certain power and torque, the degree of the engine to the engine than the compression set of a mixed gas of gasoline and air.

Octane gasoline but also according to the compression ratio may be, because there are a few rules: that is, the higher the fuel grade of gasoline, antiknock stronger, it would have to use a higher compression ratio to make gasoline burn, on the contrary, low-grade gasoline, antiknock weak, use low compression ratio engines.

3. What is the impact of automobile engine compression ratio bring?

If the low compression ratio plus high-grade gasoline, there will be insufficient fuel combustion, fuel reach the point of combustion, combustion is not sufficient, it is likely to produce a coke. If a higher compression ratio plus low-grade gasoline, this time, the fuel will knocking, knocking occurs in the engine cylinder.

In both cases, both of which are extremely detrimental to the engine.

4. The compression ratio is important to you, is to determine the basis for it?

In fact, with the development of engine technology, the compression ratio is not the only factor affecting the fuel grade, and it is determined by the compression ratio of fuel grade has not become less accurate. For example, Mazda Chong Chi blue sky compression ratio of the engine can reach 13, but with 92 oil is still no problem.

5. My car is in the end how much oil plus number, what to see?

Increase the number of grade of gasoline, just look at a thing, that is, let the tank cover on the back of the recommended value. How much oil plus the number, listen to car manufacturers give you advice on it, because the manufacturers at the time of production of the car will go through a long period of testing, it is the most scientific, most official correct label.

Finally, I do not recommend adding high-grade gasoline, not really because not only fuel efficient, but will not reduce the production of coke.