What is the difference between 92 and 95 gasoline for cars?
1 Answers
The main difference between 95-octane and 92-octane gasoline lies in the different component contents of n-heptane and isooctane. 92-octane gasoline contains 92% isooctane and 8% n-heptane, while 95-octane gasoline contains 95% isooctane and 5% n-heptane. Below is relevant information: 1. Inside the engine, the cylinders perform piston movements, and gasoline mixes with air inside the cylinders and is compressed. If the pressure is too high, knocking can occur. Anti-knock performance refers to the ability of gasoline to resist knocking when burned in the engine. The anti-knock substance in gasoline is isooctane. The octane rating of 92 or 95 gasoline indicates the fuel's anti-knock performance. The higher the octane number, the higher the isooctane content, which means better anti-knock performance. 2. The type of gasoline a car uses is related to the engine's compression ratio. The higher the compression ratio, the higher the octane number of the gasoline used. Engines with a compression ratio greater than 9:1 should, in principle, use gasoline with an octane rating above 90. Engines with a compression ratio greater than 9.5:1 are best suited for gasoline with an octane rating of 92 or higher. When the compression ratio exceeds 10:1, it is best to use 95-octane or higher-rated gasoline.
