Can 95 and 98 gasoline be mixed?
2 Answers
98 and 95 gasoline cannot be mixed. Using lower-octane gasoline in high-octane vehicles will reduce engine lifespan and increase maintenance costs. Using higher-octane gasoline in low-octane vehicles may cause delayed combustion, resulting in waste. Below is additional information about gasoline octane ratings: 1. Gasoline octane ratings represent the fuel's octane number. 95-octane gasoline contains approximately 95% isooctane and 5% heptane. Isooctane has good anti-knock properties, while heptane has poor anti-knock properties. The higher the octane rating, the better the fuel's anti-knock performance. By extension, 98-octane gasoline has even better anti-knock properties. 2. 98-octane gasoline is not suitable for all vehicles. Vehicles with fuel cap labels stating "Please use 95-octane or higher gasoline" can use 98-octane gasoline.
I often think about gasoline when driving. I've tried mixing 95 and 98 a few times, and the conclusion is that it's best not to mix them randomly. First, let me explain why. 95 and 98 represent the octane rating, with 98 having a higher octane rating and better anti-knock performance, designed for high-performance cars. My car's manual clearly states that it only takes 95. If I force in 98, the engine might idle unevenly, consume more fuel, and even damage the engine over time. Once, I mixed in 98 at a highway gas station, and the car felt sluggish and burned more fuel. So, I recommend checking the car manual—if it specifies 95, don’t mix randomly. In an emergency, adding 98 once won’t be a big deal, but mixing long-term is definitely not cost-effective and could cause problems. It’s best to stick to one fuel grade regularly to maintain fuel purity—that’s the right way.
