Originally Posted by mrphotoman

unless your car specifically calls for higher octane fue (such as the srt6)l you are wasting your money unless you have significant mods on your engine that would require the higher octane fuel to reduce the change of detonation (such as running an aftermarket supercharger or turbo on a car that came NA from the factory).

I run 93 octane for daily driving and I add Klotz octane booster/oxygenator when at the track to raise it to 98 octane. It is a true octane booster not that crap at the parts store that only raises your octane from 93 octane to 93.1 octane. The klotz is $60 a gallon and raises the octane of gas by 2.5 numbers (93 octane to 95.5 octane) for every ounce you add per gallon of gas. I add 2 oz per gallon to get 98 octane.