Originally Posted by chasedude
I've always been told that running the high octane in a "regular" vehicle is a waste of money, but if you notice the difference in performance I guess it is worth it... how about the gas mileage, it better too?
My car requires 93 octane. It will run on less, but performance is reduced. Therefore, I purchase premium.
Yes, putting high-octane/premium gasoline into a vehicle that does not require it is a waste of money. There is no increase in performance or mileage. If your engine is pinging or knocking, however, high octane fuel might solve that.
If you are uncertain, look at your owner's manual or inside your gas cover.