Cataclean is a patented & EPA-approved complete engine, fuel, and exhaust system cleaner that has been proven to reduce carbon build-up and also clean your vehicles oxygen sensors, fuel injectors, and cylinder heads. Excess carbon build-up robs your vehicle of horsepower, wastes fuel, and increases emissions output. Cataclean helps to reduce carbon build-up and optimizes your vehicles complete powertrain. Cataclean eliminates fuel injector build-up cleaning the fuel system for maximum power production