Can 95 and 98 Octane Gasoline Be Mixed?

1 Answers
DeJackson
07/29/25 9:36pm
95 octane and 98 octane gasoline should not be mixed. Here are the specific details about car refueling: 1. Gasoline grade explanation: Although 98 octane gasoline has higher anti-knock performance and power, vehicles designed for lower octane fuel should not blindly use higher octane gasoline. Higher octane numbers are more suitable for engines with larger compression ratios, while engines designed for 95 octane often have smaller compression ratios. Using 98 octane gasoline may increase engine knocking. 2. Avoid mixing: Different octane grades of gasoline should not be mixed, such as mixing 98 and 95 octane gasoline. Long-term use of mixed gasoline may have certain effects on the engine, including engine carbon deposits and increased fuel consumption.
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