Sea Foam Motor Treatment is for use in cars and trucks to dissolve and clean fuel and oil residues and deposits. It stabilizes fuel, controls moisture and lubricates upper cylinders. It is safe to use and effective when added to gas, diesel fuel and oil crankcases. Sea Foam Cleans and restores lost engine power by dissolving petroleum deposits and residues. It also stabilizes fuel by resisting evaporation, gum and varnish formation. And it lubricates upper cylinder parts for longer engine wear life. Just put 1 to 2 cans in your fuel tank every 2,000 to 5,000 miles.