Can different brands of gasoline be mixed?

[McLucille]

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 vehicle, refer to the car's user manual or check the fuel grade labeled on the fuel tank cap. What to do if the wrong gasoline is added: If a higher octane gasoline than specified is added (e.g., adding 95 octane when 92 is required), simply use up the current fuel and switch back to 92 octane afterward. If a lower octane gasoline than specified is added (e.g., adding 92 octane when 95 is required), you can add a high anti-knock fuel additive. Alternatively, you can drain the fuel tank and refill it with the correct 95 octane gasoline.