100% pure petroleum for use in cleaning harmful gums, varnish and carbon from air induction systems and combustion chambers on all 2-cycle and 4-cycle gasoline engines. Cures hesitation, stalls, pings, flat spots and rough idle due to carbon buildup. Use to store and fog 2-cycle and 4-cycle engines. Helps pass emission tests. EPA registered. Cleans intake valves and pistons. Cleans catalytic converter odors. Restores power and pickup. Oxygen sensor safe. Spray to clean all these areas with the cleaning tube and hook guide tool inserted into a sealed air intake system. Size 12 oz. spray can that can be used upside down.