Add Sea Foam Motor Treatment to all fuel and oil systems to safely clean and lubricate critical engine areas. 20 oz Truck & SUV size is great for treating larger vehicles. Cleans fuel injector and carburetor passageways, intake valves, and chamber deposits. Lubricates upper cylinders. Works in crankcase oil to liquefy harmful residues and deposits. Stabilizes gas and diesel fuels up to 2 years. For any gas or diesel fuel blend. For all motor oils, conventional and synthetic. Help your engine run smoother and last longer! Sea Foam works in fuel and oil systems to clean and lubricate critical engine areas. Made from petroleum ingredients, Sea Foam is safe and effective when used in any gasoline or diesel engine. The 20 oz. Truck & SUV size is great for treating larger vehicles! Just pour it in!