Can I Mix Half 92 and Half 98?

1 Answers
DiKathryn
07/30/25 1:01am
92-octane gasoline and 98-octane gasoline should not be mixed. Long-term mixing of different octane ratings will affect the lifespan of the car's ignition system, fuel injectors, and spark plugs, leading to earlier major repairs. The type of gasoline to be used should strictly follow the maintenance manual and user manual. Below are the hazards of mixing gasoline: Mixing higher-octane gasoline into a vehicle designed for lower octane will not cause damage, but the increase in octane rating will alter the fuel's ignition point, resulting in delayed combustion in the engine. This means both the engine's power output and thermal efficiency will decrease, and the actual feedback will be poorer performance. Using lower-octane gasoline in a vehicle designed for higher octane will cause engine knocking. Because the octane rating is too low, the gasoline will ignite prematurely during the compression stroke. If combustion occurs before the spark plug fires during the compression stroke, resistance will arise during the upward stroke. If noticeable knocking is felt, it indicates severe engine conditions. The vibrations not only affect driving stability but also cause abnormal wear on the pistons and cylinders, and in severe cases, can lead to cylinder scoring.
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