Sea Foam Motor Treatment fuel system cleaner & oil treatment — 16 oz bottle, gas & diesel, stabilizer for storage

Sea Foam Motor Treatment is a multi-purpose 16 oz additive that cleans fuel systems, stabilizes stored gasoline or diesel, and conditions engine oil to help restore performance across cars, trucks, and small engines.

Designed for gas and diesel engines, Sea Foam combines a fuel-system cleaner, fuel stabilizer, and oil treatment in one bottle. Whether you’re troubleshooting rough idle, prepping seasonal equipment for storage, or maintaining a daily driver, this product targets varnish and deposits that reduce performance. The bottle’s concentrated formula works in fuel tanks, intake systems, and crankcases to break down residues so components run cleaner and more efficiently.

How does Sea Foam clean the entire fuel system?

Sea Foam’s formula is engineered to dissolve and suspend gum, varnish, and carbon buildup that accumulate in injectors, carburetors, and combustion chambers. Regular use helps free restricted passages and restores spray patterns and airflow for more complete combustion.

• Targets injectors, carburetor restrictions, intake valves, and combustion chambers
• Add directly to the fuel tank every 3,000 miles for maintenance cleaning
• Safe for gasoline, diesel, and ethanol blends like E10 and E85

Can I use this in stored vehicles and small engines to prevent problems?

Yes—Sea Foam also functions as a fuel stabilizer that slows evaporation and helps prevent gum and varnish formation during storage. It maintains ignition vapors and lubricity so fuel stays usable, making it ideal for seasonal equipment and backup generators.

• Stabilizes gas or diesel for up to two years when mixed properly
• Recommended for cars, motorcycles, lawnmowers, boats, and generators
• Protects fuel system components while stored or infrequently used

What does Sea Foam do when added to motor oil?

When used as an oil treatment, Sea Foam helps loosen sludge and deposits inside the crankcase, promoting better oil flow and cleaning hard-to-reach areas. It’s a maintenance step to complement regular oil changes, not a substitute for scheduled service.

• Helps dissolve sludge, carbon, and restricted oil passages
• Improves lubrication by removing deposits that impede oil flow
• Compatible with conventional and synthetic oils in all engines

Will this work in both gasoline and diesel engines?

Sea Foam is formulated to be compatible with all common fuel types and blends, including gasoline, diesel, and ethanol-containing fuels. Its versatility makes it suitable for passenger vehicles, work trucks, recreational equipment, and marine engines.

• Safe for diesel, diesel blends, gasoline, and gas-ethanol blends
• Use in cars, trucks, RVs, ATVs, boats, jet skis, and power equipment
• Helps recover lost MPG and smooth out rough idling when deposits are the cause

Who is this for? Sea Foam Motor Treatment is for vehicle owners and equipment operators who want a single, concentrated additive to tackle fuel-system deposits, preserve stored fuel, and assist in oil-system cleaning. It’s useful for mechanics, DIY enthusiasts, seasonal gear preparers, and anyone maintaining mixed fleets of gas and diesel engines. Use it as part of routine maintenance every 3,000 miles for fuel-system upkeep or prior to storage to keep tanks and carburetors protected and ready.

Note: Follow product directions on dosage and application. Sea Foam supports maintenance and cleaning but does not replace required mechanical repairs or scheduled service intervals.