Can You Mix 87 And 91 Gas?

Yes, mixing 87 and 91 gas is safe, but the resulting octane level may affect performance in engines requiring premium.

By October 4th, 2025

About The Author

Tom Sincissen is the Mercedes and Lexus expert. He has 35 years of auto service experience, 14 years at the local Wichita Mercedes-Benz dealer.

Dana Bergsten, who also answers questions, has over 15 years of experience in repairing Land Rover and Acura automobiles in Wichita, KS, as well as Jaguar vehicles. Read More »

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For having over 35 years of experience, we still like to keep prices affordable and keep our work honest.

For having over 35 years of experience, we still like to keep prices affordable and keep our work honest.

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