Sea Foam

About Sea Foam: Over 80 Years of Engine Care

Few names in engine maintenance carry the kind of grassroots credibility that Sea Foam has built over more than eight decades. The brand traces its origins back to 1942, when the original formula was developed specifically to remove varnish from carburetors in outboard marine engines. Word spread quickly among fishermen and mechanics, and what began as a homegrown solution eventually grew into one of the best-selling automotive additives in North America.

Sea Foam Motor Treatment remains the flagship product, and its enduring popularity comes from a simple premise: a 100% petroleum-based formula that works in both fuel and oil systems without the risk of harsh chemical damage. It cleans fuel injectors, carburetor passageways, intake valves, and combustion chamber deposits, while simultaneously addressing the oil side of the equation — dissolving sludge and residue in the crankcase to support proper lubrication and reduce engine wear. Because it is compatible with gasoline, diesel, gas-ethanol blends, and both conventional and synthetic motor oils, a single bottle truly serves multiple maintenance purposes.

What Sea Foam Products Do

Sea Foam’s lineup is purpose-built around one core idea: engines run better and last longer when they are clean. Their fuel additives help restore lost power, smooth out rough idle, recover lost fuel economy, and overcome common engine problems by cleaning the entire fuel system from tank to combustion chamber. As a fuel additive and storage solution, Sea Foam also stabilizes gasoline and diesel for up to two years, making it a go-to choice before storing seasonal equipment like lawn mowers, boats, snowblowers, and motorcycles.

For more targeted cleaning, Sea Foam offers dedicated engine tune-up, carburetor, choke, and carbon cleaner products — including aerosol sprays designed to clean GDI intake valves and upper engine areas that liquid treatments cannot always reach. These are particularly valuable for modern direct-injection engines, where carbon buildup on intake valves is a well-known service challenge.

Sea Foam’s versatility extends further into the drivetrain as well. Their oil additive applications work directly in the crankcase to liquefy harmful oil residues and deposits, helping restore proper oil flow and reduce wear on critical engine components. And for the steering system, Sea Foam offers a power steering fluid treatment designed to clean harmful residues that can cause erratic operation or stiff steering feel.

Why Mechanics and Enthusiasts Trust Sea Foam

Sea Foam has attracted a loyal following among professional mechanics, DIYers, and outdoor power equipment owners alike. Its all-petroleum formula means it will not harm rubber seals, gaskets, or catalytic converters — a concern with some solvent-heavy competitors. It works across two-stroke, four-stroke, gas, and diesel engines, making it useful for everything from daily drivers and pickup trucks to marine engines, small equipment, and motorcycles. For anyone who depends on an engine to perform reliably, Sea Foam offers a straightforward, time-tested approach to preventive maintenance.