Permatex offers two fuel additives featuring proprietary NOS formulations to clean components and enhance performance: NOS Complete Fuel System Cleaner, No. 12203, and NOS Fuel Injector Cleaner, No.12103. NOS Complete Fuel System Cleaner cleans as the vehicle is driven, removing deposits from the entire fuel system. NOS Fuel Injector Cleaner cleans deposits from fuel injectors and combustion chambers and prevents new deposits from forming. Both formulas help prevent deposits from reforming.