What to Do If You Accidentally Fill Up with 92 Octane Gasoline Instead of 95 Octane?

[MiguelDella]

Accidentally filling up with 92 octane gasoline instead of 95 octane has no significant impact. Occasionally mixing different octane levels once or twice is not a problem, but prolonged use of the wrong octane gasoline can cause issues. The appropriate gasoline octane level for a car is determined by the engine's compression ratio, which is detailed in the vehicle's user manual. Gasoline octane ratings refer to the octane number, indicating the fuel's anti-knock properties. Higher octane gasoline has better anti-knock performance. For example, 92 octane gasoline contains 92% isooctane and 8% n-heptane, while 95 octane gasoline contains 95% isooctane and 5% n-heptane. The higher the isooctane content, the better the anti-knock performance.