I put turbo 108 octane booster in my car, i have a star stage 1 kit, i run 91 octane gas, and plus the turbo 108 octane booster, and sometimes, when i dont put that booster in my car, white smoke comes out my exhaust, but only when i take off, could this be because of the gas? or a coolant leak? somethin to do with head gasket?