Does mixing 92 octane and 95 octane gasoline once have any impact?
2 Answers
Mixing 92 octane and 95 octane gasoline once has no impact. Gasoline is a volatile and flammable hydrocarbon mixture liquid obtained from the distillation, cracking, or pyrolysis of petroleum, which can be used as fuel. It appears as a transparent liquid, with main components being aliphatic hydrocarbons, naphthenic hydrocarbons, and a certain amount of aromatic hydrocarbons. Gasoline has a high octane rating and is classified into 89, 90, 92, 93, 95, 97, and 98 octane based on the octane number. Precautions for refueling: 1. Choose to refuel when the temperature is relatively low; 2. If the car is not used for a long time or used infrequently, maintain a small amount of fuel; 3. Do not refuel when the oil tanker is unloading; 4. Turn off the engine when refueling a gasoline vehicle.
I've been driving for almost ten years, and once I accidentally mixed 92 and 95 octane gasoline at a gas station, which really worried me at the time. After starting the car, the engine noise became slightly louder, and acceleration felt less smooth. However, after driving for a while, everything returned to normal. I asked a friend at the repair shop, and he said that mixing once is not a big deal because the engine's ignition system can adapt by adjusting certain parameters. However, doing this long-term might increase fuel consumption or cause slight knocking, leading to faster wear on parts. His advice was to finish this tank of gas and then stick to the same octane rating next time. It's important to regularly check the recommended octane rating on the fuel cap to avoid similar mistakes. If you do mix fuels by accident, don’t rush to get it fixed—usually, finishing the tank will resolve the issue. Overall, an occasional mistake won’t fundamentally affect the car’s lifespan, but making it a habit could cause trouble.
