What happens if a car designed for 95-octane gasoline is filled with 92-octane?

[LeAndrew]

If a car is occasionally filled with 92-octane gasoline, there won't be significant impact. However, prolonged use of 92-octane gasoline can cause certain damage to the car's engine, and in severe cases, may even lead to engine failure. The reason cars specify fuel grades is due to differences in engine performance. Vehicles using higher-octane gasoline generally have better engine anti-knock performance. If an engine is designed for 95-octane fuel, it must be filled with 95-octane gasoline. Long-term use of gasoline with different octane ratings can affect the car's ignition system, fuel injectors, and the lifespan of spark plugs. The chemical compositions of these two fuel grades are relatively similar, but 95-octane gasoline has higher fuel efficiency and provides more sufficient power for the vehicle. Generally, naturally aspirated cars use 92-octane fuel, while turbocharged vehicles use 95-octane.