Can Sinopec and private gas station fuels be mixed?

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Fuels from different gas stations and different brands can be mixed as long as they have the same octane rating. If the octane ratings are different, even fuels 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 normal operation of the engine, and in severe cases, may lead to engine damage. To find out which octane rating your car requires, you can refer to the vehicle's user manual or check the fuel cap for the specified octane rating. What to do if you add the wrong gasoline: If you add gasoline with a higher octane rating than required by your car, for example, adding 95 octane when 92 is specified, you can simply switch back to 92 octane after the current fuel is consumed. If you add gasoline with a lower octane rating than required, for example, adding 92 octane when 95 is specified, you can add a high anti-knock fuel additive. Alternatively, you can drain the fuel and refill with 95 octane gasoline.