Gumout Multi-System Tune-Up 16 oz - 510011W Cleans: GDI/direct and port/indirect fuel injectors, carburetors, intake valves and ports, piston tops, cylinder heads, combustion chamber and crankcase Conditions: Gasoline, ethanol blend and diesel fuels to fight ethanol and water corrosion, fuel and oil to fight deterioration/destabilization Prevents: Future carbon buildup Best for: Maximized performance and fuel economy, reduced emissions, fuel stabilization US Item #: 510011 Directions: Add to fuel:For optimal results, add entire can to the tank. Fill the tank with fuel and run to near empty before refueling. One pint treats 18-21 gallons of all types of gas or diesel fuels. Add to oil:Add one ounce per quart of oil. Immediately start engine and run for 5-10 minutes to mix completely. Vacuum Intake Cleaner:May be used with engine decarbonizing equipment through the vacuum system to clean intake manifold, valves and combustion chamber. Follow recommended mechanical procedures for the equipment. Small 4-cycle engines:Add to gasoline using ¾ to 1 ounce per gallon of fuel. Small 2-cycle engines:Add to gasoline using ¾ to 1 ounce per gallon of fuel. Add 2-cycle oil as recommended by engine manufacturer. Gumout® Multi-System Tune-Up does not replace 2-cycle oil.