Valvoline™ Fuel Injector Cleaner is a super-concentrated formula that cleans deep to restore lost power and performance. Designed for use every 3,000 miles, powerful cleaning agents help boost fuel economy by keeping fuel injectors, carburetors and intake valves clean of harmful, power-robbing deposits. Over time, gasoline hydrocarbons and certain additives found in some gasoline will build up on the surface of fuel injectors, intake manifold runners, intake ports and intake valves. Deposits in any of these areas can impair fuel economy and drivability, causing poor starts, stalling, hesitation, stumbling and decreased warm engine performance.