Can 92 and 95 gasoline be mixed?
2 Answers
92 and 95 gasoline cannot be mixed. Here are the specific details: 1. Gasoline octane rating: It is the ratio of the actual gasoline's anti-knock performance to that of standard gasoline. The higher the octane number, the stronger the anti-knock performance. Standard gasoline is composed of isooctane and n-heptane. However, a higher octane number is not always better; the gasoline grade should be reasonably selected based on the engine's compression ratio. 2. If a car designed for 92 gasoline is filled with 95 gasoline, it will not cause significant damage to the car, but it may lead to incomplete combustion, resulting in engine carbon deposits. Conversely, if a car designed for 95 gasoline is filled with 92 gasoline, under the same compression conditions, 92 gasoline is more prone to explosive combustion than 95 gasoline, which can cause premature combustion and lead to engine knocking.
As a veteran driver who frequently takes long trips, I know that 92 and 95 octane gasoline can be mixed, but don't do it frequently. The octane number is an indicator of anti-knock performance. After mixing, it will become an intermediate value, such as around 93. If your car is designated to use 95 octane, the engine is prone to knocking sounds, which affects performance. I have a turbocharged car that I tried mixing once, and I felt the acceleration was slower and fuel consumption increased a bit. When I took it to the repair shop, the mechanic said there wouldn't be major issues in the short term, but long-term use might lead to carbon buildup or piston damage. It's recommended to stick to the manufacturer's recommended octane rating normally. In emergencies, you can mix once, but refill with the correct gasoline as soon as possible. Choose reputable gas stations to avoid trouble.
