This an additive you can put on your air filter, or an air filter with the additive attached; This "Carbon Buster", removes carbon from the engine; Because of the removal of the carbon other things happen; This removal of the carbon cleans out the engine which in turn causes other things to happen such as-- The vehicle gets better gas mileage, the air conditioner blows colder air, the engine runs quiter, the vehicle has better acceleration, it preforms better, the vehicle computer works better, it gives overall improved vehicle performance, it reducex or eliminates altogether vehicle overheating, and makes cold starts easier; The catylist used in the Carbon Buster burns more of the fuel that is ignited which, in turn, means it uses less fuel, which in turn (again) means there would be less emmisions going into the catylic converter, or, in the case of older cars, going into our air; Removing carbon will extend the life of an engine; This mean less maintenane