Can You Add 95 Gasoline When 92 Gasoline Is Not Completely Used Up?
2 Answers
92 gasoline is not completely used up can add 95 gasoline, which is not harmful to the car, and there will be no chemical reaction between the gasolines. Different grades of gasoline have different octane values, and there are few other differences besides this. The higher the grade of gasoline, the higher the octane value, and the higher the octane value, the better the anti-knock performance of the gasoline. If your car requires at least 92 gasoline, you cannot add gasoline below 92; if your car requires at least 95 gasoline, you cannot add gasoline below 95. Gasoline is a volatile and flammable hydrocarbon mixture liquid obtained from petroleum through fractionation, cracking, or pyrolysis, and can be used as fuel.
As a car enthusiast, I often get asked this question by friends. It's perfectly fine to add 95-octane gasoline when there's still some 92-octane left in the tank, because they have different octane ratings - 92 has poorer anti-knock properties while 95 is stronger. When mixed, the octane rating will average around 93, which is no big deal for modern engine management systems that can automatically adjust ignition timing to prevent knocking. In the short term, there's little risk and the engine might even run slightly smoother. However, for high-performance vehicles like turbocharged engines, octane fluctuations from mixing could lead to uneven combustion in certain areas, potentially increasing carbon deposits or causing minor vibrations. Economically speaking, while 95-octane is more expensive, mixing doesn't significantly raise overall costs but doesn't save money either. It's recommended to follow the vehicle manual's specified fuel grade. Long-term mixing of different fuel grades may slightly reduce fuel system efficiency, such as making injectors more prone to fouling. Avoid mixing when there's too much fuel remaining - the safest approach is to wait until the tank is nearly empty before switching to a single fuel grade.
