What is the Difference Between Gasoline Grades?

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Taking 92-octane and 95-octane gasoline as examples, the specific differences between gasoline grades are as follows: 1. Applicable compression ratio: Vehicles with a compression ratio between 8.5-9.5 should generally use 92-octane gasoline, while cars with a compression ratio greater than 9.5 should use 95-octane gasoline. 2. Octane rating: 92-octane gasoline has a lower octane rating than 95-octane gasoline. Specifically, 92-octane gasoline contains 92% isooctane, while 95-octane gasoline has an octane rating of 95%. The gasoline grade represents the octane number of the gasoline. For example, 92-octane gasoline consists of approximately 92% isooctane and 8% n-heptane. Since isooctane has better anti-knock properties while n-heptane has poorer anti-knock performance, a higher octane number indicates better anti-knock properties of the gasoline.