What are the effects of mixing gasoline on a car?

[DamianLee]

The effects of mixing gasoline on a car are as follows: Low-grade gasoline: If the vehicle is designed for low-grade gasoline, mixing in high-grade gasoline is acceptable, but long-term mixed use is not recommended. Wear: If the vehicle is designed for high-grade gasoline, long-term use of low-grade gasoline should be avoided as it increases the frequency of knocking and accelerates engine wear. The gasoline grade represents the octane number of the gasoline. For example, 92-grade gasoline consists of approximately 92% isooctane and 8% n-heptane. Since isooctane has better anti-knock properties compared to n-heptane, higher-grade gasoline with higher octane numbers indicates better anti-knock performance.