87 octane to 93 octane, any difference Options

[rocky2006]

is there any difference in power/gas mileage/how well the engine runs? if so, how much of a difference in each?

[stormtrupr]

from what i know....using a diff octane than what the car is made for screws up the timing and makes the timing retarded(a phrase ive heard...im not making it up). this has to do with the detonation being early or late. when you add performance mods and increase boost with a turbo or supercharger...you increase the preassure and the lower octane gas can detonate too early...that is why you use higher octane when you have more mods to keep the timing right. overall...you probably wouldnt notice much difference between 87 and 93 for our cars unless you have mods, so using 93 is a big waste of money and too much fuel sent to the cat can damage it like consyx said...basically there is absolutly no point for a stock engine made to run on 87....you could save the money and use it for mods!