What happens if a car designed for 92 octane gasoline is filled with 95 octane?
1 Answers
Filling a car designed for 92 octane gasoline with 95 octane will slightly increase fuel consumption, but it will not cause any actual harm to the vehicle. Mixing 92 and 95 octane gasoline is essentially equivalent to using 93 or 94 octane, which still falls within the required octane range for gasoline engines. After adding mixed gasoline, the engine's ECU will automatically adjust the ignition timing to adapt to the fuel's octane rating. The octane number of gasoline only represents its anti-knock properties and has no relation to the quality of the gasoline. During the compression process from the bottom dead center to the top dead center, the engine piston compresses the air-fuel mixture in the combustion chamber, generating high temperature and pressure. Lower-octane gasoline has a lower ignition point and faster combustion rate, resulting in poorer anti-knock performance. In high-compression engines, it is more prone to premature compression ignition. Higher-octane gasoline burns more slowly and has a relatively higher ignition point, providing better anti-knock properties. It allows for higher cylinder pressure or temperature, preventing premature compression ignition of the gasoline under high temperature and pressure.
