12 OZ, Lead Gas Additive, Valve Seat Anti-Wear Additive, Assures Proper Lubrication Of Valves & Upper Cylinder Areas For Engines Built For Leaded Gasoline, For Use With Lead Or Unleaded Gasoline, Protects Against Loss Of Power, Increases Fuel Economy Helps Keep System Clean, A Must For RV's, Off Road Equipment, Boats, Cycles, Tractors, Lawn Mowers & Snow Blowers, Pour Bottle.