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What to Do If You Mix 92 and 98 Octane Gasoline?

1 Answers

LeOscar

07/30/25 4:48am

Mixing 92 and 98 octane gasoline is not a concern for vehicles requiring lower octane fuel, as it generally won't cause any issues. However, for vehicles designed for higher-octane gasoline, there is a risk of engine knocking, and it's advisable to increase the octane level of the fuel in the tank. Different octane grades of gasoline do not undergo any chemical reactions when mixed, and the only difference between them is the octane rating—the quality of the gasoline itself remains unchanged. For cars that require high-octane gasoline, it's best to avoid mixing different octane grades, as this can lower the octane value and potentially lead to engine knocking. Conversely, vehicles that run on lower-octane gasoline do not benefit from using higher-octane fuel, as it is completely unnecessary.

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