Chevron 65740-CASE Techron Concentrate Plus Fuel System Cleaner - 20 oz., (Pack of 6) Cleans, restores, protects the entire fuel system (fuel injectors, carburetors, intake valves and combustion chambers) Restores: lost power, acceleration, lost fuel economy, and operation of the fuel gauge sensor Reduces: rough idle, engine surge, hesitation, and spark plus fouling Improves: cold start performance, and fuel stability for up to one year Automobiles and trucks use every 3,000 miles or at your next oil change. All other gasoline engines use as needed (motorcycles, dirt bikes, boats, ATVs, RVs, water craft, lawn care, etc.)