I know when I had my 87' GrandNational when turning up the boost you would dump a couple gallons of VP fuel in the tank to help keep it from detonation. The down side was that it tore up O2 sensors after 1 night of racing so you always had to swap a new set in for the ride home. Are the new 5.0's and thing like this? Anyone running race fuel, and if so what octane and what is done to your car and could you tell adifference? Has it ever harmed the O2 sensors at all?