Morey’s Upper Cylinder Lubricant is a lead replacement, upper cylinder lubricant, fuel system cleaner and conditioner that is designed to reduce exhaust emissions, improve fuel delivery and reduce wear on engine valves and valve seats. Morey’s Upper Cylinder lubricant removes resins and gums that hold carbon deposits in place from pistons, valves and combustion chambers to fuel delivery. The lubricating formula ensures components are protected from wear corrosion. Morey’s Upper Cylinder Lubricant is Ideal for late model cars/vehicles which use LPG, CNG and petrol and can also be used as a lead replacement for older vehicles that require leaded petrol is used. Safe for catalytic convertors and oxygen sensors as well as 2 and 4 stroke engines including 2 stroke premix.