What to Do If 92 and 98 Gasoline Are Mixed?

2 Answers
Cheyenne
07/24/25 11:42pm
Effects of mixing 92 and 98 gasoline: 1. Gasoline grade is 92: If the vehicle's specified gasoline grade is 92, mixing with 98 gasoline is acceptable, but long-term mixed use is not recommended. 2. Vehicle grade is 95 or 98: If the vehicle's fixed gasoline grade is 95 or 98, mixing with 92 gasoline will have an impact. There is a possibility of engine knocking. It is necessary to increase the gasoline standard in the fuel tank, and long-term use of 92 gasoline will increase the frequency of knocking and accelerate engine wear. Additional information: The gasoline grade represents the octane number of the gasoline. For example, 92 gasoline contains about 92% isooctane and 8% heptane. Since isooctane has better anti-knock properties and heptane has poorer anti-knock properties, a higher grade indicates a higher octane number, meaning the gasoline has better anti-knock performance.
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MacAva
08/10/25 3:29pm
I've encountered the situation of mixing 92 and 98 octane gasoline a few times, and it's actually not too serious. The key is how to handle it. Pay attention to the engine condition during normal driving. If the proportion of mixed fuel is small and the car runs normally, you can simply run the tank dry and then fill up with higher-grade 98 octane to dilute it. Mixing fuels may lead to incomplete combustion, causing knocking or carbon deposits, but it won't damage the core components. Next time you refuel, make sure to check the numbers on the pump to avoid mistakes. If you feel the car shaking or making loud noises during acceleration, slow down and avoid stomping on the gas pedal. After running the mixed fuel, add a cleaning additive once to clean the fuel system. Develop the habit of refueling according to the manual's recommendations to reduce unnecessary troubles.
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