STP® Premium 2-Cycle Oil with Fuel Stabilizer 50:1 meets JASO FD certification specifications* and is scientifically formulated for outdoor power equipment to help maintain maximum engine performance. Engineered with anti-wear technology to help reduce friction, its premium formulation helps keep the fuel system clean and smoke exhaust low. Plus, it contains fuel stabilizer to keep fuel fresh during infrequent use. Thoroughly mix contents of the bottle into one gallon of unleaded gasoline for 50:1 ratio. Can be used with string trimmers, chainsaws, leaf blowers, 2 cycle generators and other air cooled 2 cycle gasoline powered small engines (refer to owner?s manual).