Originally Posted by Donger
Yes, it is. I ran regular octane through my car once and while it ran, performance was noticeable reduced. Enough so that I don't mind the extra $.40/gallon.
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?