Should private cars generally use 92 or 95 when refueling?

[DelaneyDella]

Private cars require different types of gasoline depending on the model and brand. Here is a detailed introduction to the two types of gasoline: 1. 92 gasoline: 92 gasoline has an octane rating of 92 and a heptane content of 8, making it suitable for mid-range cars (with lower compression ratios). 2. 95 gasoline: 95 gasoline consists of 95% isooctane and 5% heptane. High-compression engines should use high-octane gasoline. Using low-octane gasoline in high-compression engines can cause abnormal combustion, leading to knocking, increased fuel consumption, and reduced driving power. Of course, high-compression engines can also use lower-grade gasoline, but it is not advisable to choose gasoline solely based on compression ratio. Instead, follow the manufacturer's recommendations. 3. Differences between 92 and 95 gasoline: Anti-knock properties differ. The gasoline grade represents anti-knock performance, with higher grades indicating better resistance to knocking. Prices vary, with 95 gasoline being slightly more expensive than 92 gasoline. Performance differs, as 95 gasoline is suitable for engines with higher compression ratios.