Star Tron Fuel System and Injector Cleaner combines proprietary Star Tron enzymes with high-performance cleaning agents.Fuel System and Injector Cleaner is engineered to quickly remove even the toughest performance-robbing deposits from carburetors, fuel injectors pumps, valves or rings that can form on even the newest technology engines.Formulated with a proprietary blend of enzymes and high-performance cleaning agents, it restores power and performance quickly and cost-effectively.Use 1 fl. oz. of Fuel System and Injector Cleaner for every 10 gallons of fuel being treated. Recommended treatment rate is every four to five tanks or as often as needed. Using original Star Tron Enzyme Fuel Treatment at every fuel fill-up is also recommended to keep engines operating at peak performance levels.Key FeaturesEngineered to remove tough deposits in fuel systemsCleans Injectors, carburetors, fuel pumps, valves and ringsSimple to use; add to fuel and run engineCombines Star Tronenzymes with powerful cleaning agentsTreats up to 40 gallons of gas