Can 98 Octane and 95 Octane Gasoline Be Mixed?

1 Answers
CaydenLynn
07/29/25 4:13pm
98 octane and 95 octane gasoline cannot be mixed. Adding lower octane gasoline to a high-octane vehicle can severely affect the normal operation of the engine, leading to knocking, and in severe cases, it can reduce the engine's lifespan and increase maintenance costs. Conversely, adding higher octane gasoline to a low-octane vehicle can cause delayed combustion, resulting in incomplete fuel burning and waste. Vehicle manufacturers specify the type of fuel to be used, which depends on the engine's compression ratio. If a high-octane vehicle accidentally uses lower octane fuel, the engine may experience knocking, reduced power, and increased water temperature. Gasoline is a mixture, and the octane rating indicates its anti-knock index. Strictly speaking, 98 octane and 95 octane gasoline should not be mixed, although their chemical compositions are relatively similar and both have strong anti-knock properties. To ensure vehicle safety, it is better to use them separately.
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