The original “liquid science”, Cataclean is a patented formula that targets carbon and varnish throughout the fuel and exhaust path on gasoline engines. This high-capacity 5-liter jug is ideal for trucks, fleet vehicles, and industrial use. Cataclean helps clean fuel injectors, intake valves, combustion chambers, oxygen sensors, and the catalytic converter substrate to restore lost performance, reduce hydrocarbon/CO/NOx emissions, and optimize fuel economy. By reducing carbon build-up, Cataclean promotes more complete combustion and steadier O2 sensor feedback, supporting smoother idle and throttle response. Easy to use—add per instructions to the fuel tank—Cataclean is a proven service product to help maintain emissions compliance and extend component life across hard-working vehicles.Cataclean is a patented complete engine, fuel, and exhaust system cleaner that has been proven to reduce carbon build-up and also clean your vehicle's 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 vehicle's complete powertrain. Cataclean eliminates fuel injector build-up cleaning the fuel system for maximum power production