According to numerous FORD technicians...

and the owners manual states 87 octane is the only gas u should burn, unless you have a supercharger. The Ford technicians said that our engine(4.6 or 3.8) is "desingned" to burn 87 octane and burning "premium" could make knocking/pinging worse, as well as harm the engine down the road! This is just really strange to me, wouldnt you want to burn a higher octance gas to keep to keep the injectors, valves, etc.. cleaner?? Whats your guys take on this, just curious??