Brand New Lot of Three (3) STP Multi-Purpose Motor Treatment and Fuel Stabilizer, Fuel System Cleaner for Gas, Diesel, 2 Stroke, 4 Stroke, 16 Oz For engines in storage: Stabilize fuel; Fight rust buildup in the fuel tank; Prevent oxidative degradation in the fuel; Fight tough cold starts; Prevent fuel line freeze by removing water For engines in use: Clean engine deposits and fights friction; Clean fuel injectors and intake valves; Protect against viscosity buildup; Protect against crank case sludge; Provide upper cylinder lubrication Works with gas, diesel, two-stroke and four-stroke engines Helps restore lost horsepower and performance Contains no corrosion causing alcohol.