Originally Posted by budjr
who sells 91 octane. I have been getting 93 cuz the stations down here go from 87 to 89 to 93.
Hi, Budjr, and welcome to the forum. When you have a minute please complete your user profile (vehicle(s), locale, etc.).
There is also nothing wrong with blending gas, you could fill up with half 89 and half 93, which at a single fillup is rather bothersome. But for example if you're currently running 89, when you're at 1/2 tank fill up with 93 to yield 91. As you run down the next time, fill up with 93, then as you burn that off, when you're around a half put in 89, then just repeat that cycle. It's kind of a bother but you can save a little money this way, and you're meeting your car's proper minimum spec as well. Plus that "in between" fillup with roughly a half-tank of 89 will feel very affordable. The only caveat here is that you'd want to stay with the same brand of gas if you're in a place they use ethanol blends.
(Yeah, I know, all you picayune types will point out that over time this will yield a net octane greater than 91, but that's okay...if you want to give him the calculus beyond the approximation, feel free.).
Take care and enjoy the ride,