My buddy Dave once mixed 95 and 98 in his SUV because he was stuck in the middle of nowhere. He called me panicking, thinking he’d blown his engine. I told him to calm down and just drive. He drove 400 miles that day. Nothing happened. The only thing that changed was his blood pressure.
I’ve also seen a woman at a rural pump pour half a tank of 95 into her Audi that specifically said “98 only.” She was sweating like she was committing a felony. I gave her a thumbs up and said, “Your car will live.” She laughed nervously, got in, and drove off without a single ping. Modern cars are basically forgiving babysitters.
The Only Real Risk: Your Wallet
Let’s be practical. Mixing 95 and 98 is mostly a financial decision. You’re paying for a higher octane that your engine might not use. It’s like buying a 10-gallon water jug when you only own a thimble. You’ll just have expensive fuel sitting around, burning no differently than the cheap stuff.
If you’re mixing because you have to, don’t lose sleep. The chemical properties just combine into an average octane. 95 plus 98 equals roughly 96.5. It’s not rocket science; it’s gas station arithmetic. Your car will treat it like any other fuel, just with a slightly fancier pedigree.
Can you safely mix regular (95) and premium (98) gasoline? - Futura
