Should Regular Cars Use 92 or 95 Octane Fuel?

[EmersonDella]

The choice of fuel octane rating should be determined by the compression ratio of the car's engine. The appropriate fuel octane rating for the vehicle is usually indicated on the inside of the fuel tank cap. If it specifies 92 octane fuel, then use 92. If it specifies 95 octane fuel, then use 95. Whether it's 92 or 95 octane fuel, the number represents the fuel's anti-knock properties. A higher octane number indicates better anti-knock performance, but it has little to do with the quality of the gasoline itself. It is not necessarily true that a higher octane rating means better fuel, as many car owners commonly believe. For naturally aspirated engines, 92 octane fuel is generally recommended. Higher octane fuel has better anti-knock properties but burns relatively slower, which can lead to a higher compression ratio in the engine, resulting in reduced power and increased temperature. For turbocharged engines, manufacturers usually recommend using at least 92 octane fuel. Using 95 octane fuel can not only achieve higher torque at low speeds but also reduce engine vibration and lower noise levels.