Optimax will make NO DIFFERENCE to the running of your car!!

High octane fuel basically resists detenation better than lower octane fuels meaning it is less likely to explode due to high cylinder temps or pressures, When fuel is ignited by the spark plug it is a controlled burn. When detonation takes place it is a serious explosion!

Weather your engine takes advantage of this high octane depends what you tell it to do ie ignition advance. It will not cause any advirse affects on an engine that doesnt require it, other than in your pocket!