Is 92 or 95 gasoline better?

[McEmilia]

The difference between 92 and 95 gasoline is not about quality, but the different content of added isooctane, which affects the gasoline's anti-knock performance. Here is additional information about 95 and 92 gasoline: 1. 95 gasoline: 95 gasoline consists of 95% isooctane and 5% n-heptane. High-octane gasoline should be used when the engine has a high compression ratio. Using low-octane gasoline in a high-compression engine can cause abnormal combustion, leading to knocking, increased fuel consumption, and reduced driving power. 2. 92 gasoline: 92 gasoline has an octane rating of 92 and contains 8% n-heptane, making it suitable for mid-range vehicles with lower compression ratios. 3. Reason: Follow the manufacturer's recommendations for fuel type. Avoid long-term use of higher-octane gasoline, as it can alter ignition timing and may harm the engine, shortening its lifespan. Higher-octane gasoline can be used in emergencies, but lower-octane gasoline should never be used.