Does mixing 92 and 95 octane gasoline have any impact?
2 Answers
Mixing 92 and 95 octane gasoline has no impact, but it is not recommended. Gasoline is a volatile, flammable hydrocarbon mixture liquid obtained from petroleum through distillation or cracking processes, used as fuel with high octane ratings. Characteristics of gasoline include: 1. Corrosiveness: Sulfur compounds in gasoline can corrode materials; 2. Stability: The ability to resist oxidation under normal temperature and liquid phase conditions is called stability; 3. Anti-knock property: Refers to gasoline's ability to resist detonation combustion under various usage conditions; 4. Volatility: In engine cylinders, gasoline rapidly vaporizes and forms a uniform combustible mixture with air.
I've driven for several years and encountered this situation when refueling. Mixing 92 and 95 octane gasoline won't cause major issues, it mainly depends on what your car requires. If you mix them in the fuel tank, the octane rating will average out. For example, half a tank of 92 and half of 95 would be equivalent to around 93.5 octane. If your car originally requires 92 octane, mixing in 95 won't harm it, but you'll spend more money. However, if your car requires 95 octane and you mix in 92, the anti-knock performance may be insufficient, potentially causing engine knocking, and prolonged use could damage the engine. Once on the highway when I ran out of fuel, I had to mix 92 into my 95 octane tank, and drove several hundred kilometers without issues, but I still had it checked at the dealership afterward. It's recommended not to mix fuels more than twice, and to use up the mixture as soon as possible before refueling with the correct grade.
