TECHRON Concentrate Plus Complete Fuel System Cleaner (CFSC), with its exclusive formula, is unsurpassed in cleaning the entire fuel system (fuel injectors, intake valves and combustion chambers) in one tankful. Its use can maximize fuel economy and restore lost power, performance and acceleration. TECHRON CFSC is formulated with a proprietary combination of polyetheramine (PEA) that works in one tankful to remove deposits that can cause a loss of power, hesitation, knocking & pinging and higher exhaust emissions. Regular use can help prevent harmful sulfur components in gasoline from attacking sensitive electronic fuel sending units on some vehicles. Also, by cleaning combustion chamber deposits, it can relieve cold start problems and minimize deposit-related knock and ping. TECHRON CFSC is fully compatible and protective in all commercially available ethanol blends (E10, E15, E85, etc.). TECHRON CFSC is designed for all gasoline engines including carbureted, two-stroke, four stroke, port fuel injected and direct injected engines. To keep the entire fuel system clean, use TECHRON CFSC every 3,000 miles or at scheduled oil change intervals. Will not harm catalytic converters and oxygen sensors. Not recommended for diesel engines.