What are the effects of adding 92-octane gasoline when 95-octane gasoline is not fully used up?

[VonJaxon]

The effects of adding 92-octane gasoline when 95-octane gasoline is not fully used up are: 1. Occasionally mixing once will not harm the car or the engine; 2. Long-term mixed use may cause engine knocking, increase carbon deposits in the engine, raise fuel consumption, and wear the engine. If you want to change the gasoline grade, you can switch directly. However, when switching from a higher grade to a lower grade, it is recommended to wait until the fuel gauge light comes on (i.e., the fuel gauge pointer is in the red zone) before refueling. It is also advisable to stick to one grade of gasoline and avoid frequent switching. Higher-octane gasoline is not necessarily better, as it burns slower, which can reduce engine power and increase temperature.