What is the Difference Between Gasoline Grades?

[DelAnna]

Gasoline grades differ in the following aspects: 1. Different octane numbers. The higher the gasoline grade, the higher the octane number. 2. Different anti-knock properties. The higher the gasoline grade, the better the anti-knock performance. 3. Different uses. The higher the gasoline grade, the higher the anti-knock coefficient of the gasoline, and the corresponding requirements for the compression ratio of the car are also different. The higher the engine compression ratio, the higher the required anti-knock coefficient of the gasoline. Relevant information is as follows: 1. The gasoline grade is the ratio of the actual anti-knock performance of gasoline to that of standard gasoline. Standard gasoline is composed of isooctane and n-heptane. 2. The primary criterion for selecting a gasoline grade for a car is the engine's compression ratio, which is also a core energy-saving indicator of modern cars. Increasing the compression ratio only changes the piston stroke. The more the air-fuel mixture is compressed, the greater the reaction force of combustion, and the more complete the combustion.