What number of gasoline is better for cars?

Speaking of refueling, we often see 97 and 93 gas stations. What is the specific difference between the two? How much gasoline is better for the car? Let's talk it over with you today.

What's the difference between 97 and 93?

Let's talk about what these 97 and 93 gasoline mean first. Different gasoline numbers mean different gasoline octane numbers. The higher the octane number, the less likely the gasoline will deflagrate at high temperature and high pressure. To put it bluntly, it is more resistant to burning.

Today's gasoline engines all rely on the piston to compress the atomized gasoline-air mixture, and then the spark plug violently ignites and expands to push the piston to do work and generate electricity, so that the car can move forward. But when compressed to a certain extent, gasoline will explode by itself, wasting a lot of combustion energy, resulting in low engine horsepower. Therefore, according to the compression ratio, the greater the compression ratio of the cylinder, the more work the combustion gas does to push the piston, and the higher the engine efficiency. What does this have to do with fuel? Simply put, the higher the fuel number, the slower the engine oil combustion speed and the higher the engine compression ratio. On the contrary, low-grade fuel burns faster and the engine compression ratio is lower.

The higher the label, the better?

Is it better to choose a higher gasoline grade? Of course not! Because the choice of gasoline label is mainly based on the compression ratio of the engine, and the parameters such as compression ratio have been set in the engine computer, the owner must choose gasoline in strict accordance with the requirements of the instruction manual. If the engine compression setting is relatively low and high-grade gasoline is used blindly, acceleration will be weak and fuel will burn.

However, if the engine is designed with high compression ratio according to No.97 gasoline, but the owner uses low-grade No.93 gasoline, the ignition time will be advanced and the piston crankshaft will be greatly impacted. At the same time, the original precision seal piston design will cause permanent wear and tear, and the engine efficiency will be permanently reduced, which is why you can't refuel at will.

To sum up briefly, because the engine settings of different cars are different, it is necessary to add gasoline in strict accordance with the engine compression ratio or according to the suggestions in the automobile manual, so as to give full play to the engine power more scientifically, economically and fully.

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