Can 95 gasoline be added after using 98 gasoline?
2 Answers
It is possible to add 95 gasoline after using 98 gasoline, but this should only be done in emergencies and not for prolonged mixed use. 95 gasoline and 98 gasoline have different additives and chemical compositions. Mixing them occasionally will not cause significant harm to the car. If you mix different grades of gasoline in an emergency, there is no need to worry; simply refuel with the appropriate grade later. However, prolonged mixing of different gasoline grades can harm the car's ignition system, fuel injectors, and spark plugs. Gasoline with different octane ratings has varying levels of octane numbers. Higher-grade gasoline has a higher octane number, and gasoline with a higher octane number has better anti-knock performance.
I've been driving a regular family car for many years and occasionally used 95 octane when 98 was unavailable at gas stations. It didn't seem to cause major issues, but the power response did slow down a bit, and acceleration wasn't as smooth as before. The key is your engine type: if it's turbocharged or a high-performance engine, manufacturers usually recommend 98 octane. Mixing with lower octane fuel might cause knocking—it's usable short-term but harms the engine long-term. Saving a little money could lead to higher fuel consumption or repair costs, which isn't worth it. I suggest checking your manual for the recommended fuel grade and sticking to it next time. I also pay attention to fuel quality and avoid low-reputation gas stations to prevent impurities from affecting combustion efficiency. Remember, safety first—don't gamble with your engine's health.
