Can 92 and 95 gasoline be mixed together?
2 Answers
92 and 95 gasoline cannot be mixed together. If these two types of fuel are used simultaneously, combustion in the vehicle's engine may not be as complete as when using only one type, potentially leaving behind a significant amount of combustion residues. If a vehicle is consistently fueled with a mix of 92 and 95 gasoline over a long period, the engine may accumulate a large amount of carbon deposits, which can affect performance and increase fuel consumption. Gasoline is a volatile, flammable liquid hydrocarbon mixture derived from the fractional distillation, cracking, or pyrolysis of petroleum, primarily used as fuel for spark-ignited internal combustion engines. It mainly consists of organic compounds obtained from crude oil distillation and various additives.
Having worked in car repairs for over a decade, I've seen many car owners temporarily mix 92 and 95 gasoline. In fact, the basic components of gasoline are the same, mainly differing in octane ratings. 95-octane has better anti-knock properties. If your car is supposed to use 92, occasionally mixing in some 95 is completely fine; conversely, a car that requires 95 mixed with 92 might experience minor knocking, but modern cars have ECUs that can automatically adjust ignition timing. However, you shouldn't mix them long-term. I once repaired a car with severely carbon-fouled spark plugs due to long-term mixed usage. It's okay in emergencies, but remember to switch back to the correct grade for the next full tank. Also, the additive formulations in gasoline vary by region, and mixing them might cause minor fuel system issues.
