Can Gasoline from Different Brands Be Mixed?

[DeHarley]

Gasoline from different gas stations and brands can be mixed as long as they have the same octane rating. If the octane ratings differ, even gasoline from the same brand should not be mixed, as this can lead to abnormal combustion, causing engine knocking. Knocking not only damages the combustion chamber but also directly affects the engine's normal operation, potentially leading to severe engine damage. To determine the appropriate gasoline grade for your car, refer to the vehicle's user manual or check the fuel grade indicated on the fuel tank cap. How to handle adding the wrong gasoline: If you accidentally add gasoline with a higher octane rating than required—for example, using 95 octane when 92 octane is specified—simply continue using it until the tank is empty, then refill with the correct 92 octane gasoline. If you add gasoline with a lower octane rating than required—for example, using 92 octane when 95 octane is specified—you can add a high anti-knock fuel additive. Alternatively, you can drain the incorrect gasoline and refill with the correct 95 octane fuel.