Sea Foam Sales Company, also known as Sea Foam International, is a leading American manufacturer of fuel and oil additives designed to clean, protect, and maintain engines across automotive, marine, small engine, and industrial applications. The company traces its origins to the 1930s when Fred Fandrei created a petroleum-based solution to treat outboard motor fuel. That product eventually became the iconic Sea Foam Motor Treatment—officially launched in the early 1940s.

Over the decades, Sea Foam has built a reputation for simple, safe, and effective engine treatments that dissolve harmful deposits, lubricate components, stabilize fuel, and restore engine performance. Its expanding product lineup includes Sea Foam High Mileage, Marine PRO, Spray Top Engine Cleaner, and Deep Creep penetrating lubricant.

All of Sea Foam’s core products are proudly made in the USA, with formulations, blending, and packaging completed in domestic manufacturing facilities. While some packaging materials may be sourced globally, the active ingredients and processing are fully U.S.-based—supporting American jobs, quality standards, and trusted performance.

Known for its no-nonsense formulations made from 100% petroleum-based ingredients, Sea Foam products are free from harsh chemicals and are safe for all gasoline and diesel engines. Mechanics, gearheads, and everyday drivers rely on Sea Foam to help engines run cleaner, start easier, and last longer—upholding a legacy of American-made reliability for over 80 years.

Keep engines running their best with this versatile motor treatment in a shop-size 1-gallon can. Formulated to be used in fuel and oil, it dissolves harmful gum and varnish, frees sticky deposits, and adds upper-cylinder lubrication to help restore smooth idle and responsive throttle.

Designed for all gasoline and diesel engines—cars, trucks, UTVs, boats, lawn and garden equipment, generators, and more—it’s compatible with carbureted and fuel‑injected systems, as well as 2‑stroke and 4‑stroke designs. Use it in the tank to clean injectors and carb jets and help control moisture, or add to crankcase oil to help loosen and suspend deposits before an oil change.

The petroleum-based formula is oxygen-sensor and catalytic‑converter safe and contains no harsh detergents that can damage fuel system components. Regular use supports easier starts, smoother running, and longer service life for critical engine parts.

Proudly blended and packaged in the USA, this value-size gallon is perfect for shops, fleets, and serious DIYers who maintain multiple engines. Choosing an American-made formula with domestic and global ingredients helps support local jobs while delivering proven performance you can trust.

Motor Treatment and Fuel Stabilizer, 1 Gallon

Fuel System

Fuel System Cleaners

Petroleum-based multi-system additive that cleans, lubricates, and stabilizes fuel. Safe for gasoline or diesel engines, carbureted or fuel-injected, 2- and 4-stroke. Ideal for routine maintenance and seasonal storage.

Motor Treatment and Fuel Stabilizer, 1 Gallon

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