Sea Foam SF-16 Motor Treatment — Twin 16 oz Engine Cleaner & Fuel Stabilizer, Safe for Gas & Diesel

Sea Foam SF-16 Motor Treatment is a 100% pure petroleum additive sold as a twin 16 oz pack that cleans and stabilizes fuel and oil systems to help engines run smoother.

Sea Foam SF-16 is an industry-standard engine cleaner and stabilizer used for over six decades. The formula is EPA-registered and designed to dissolve gum, varnish, and carbon deposits in fuel systems and oil passages without harming seals, gaskets, catalytic converters, or oxygen sensors. It works in both gasoline and diesel engines and is supplied here as two 16-ounce bottles for multiple treatments or larger tanks.

How does Sea Foam improve engine idling and reduce hesitation?

Sea Foam penetrates and liquefies carbon, gum and varnish deposits that interfere with fuel flow and valve movement. By clearing those obstructions, the engine can maintain a steadier idle and respond more smoothly to throttle input.

• Breaks down deposits on carburetors and injectors to restore consistent spray patterns.
• Frees sticky valve lifters and rings to reduce misfires and rough idling.
• Helps eliminate pinging and hesitation caused by uneven fuel delivery.

Can I use Sea Foam in both fuel and crankcase oil?

Yes — Sea Foam is formulated for safe use as a fuel additive and as an oil system treatment. In fuel it cleans injectors and stabilizes fuel; in oil it helps control moisture and removes residue without damaging internal components.

• Add to gasoline or diesel tanks to clean fuel lines, injectors, and carburetors.
• Use in the crankcase to help dissolve sludge and maintain oil flow.
• Stabilizes stored fuel for up to two years and adds lubricity to reduce wear.

Is Sea Foam safe for modern engine systems and emission controls?

Sea Foam is EPA-registered and formulated to be compatible with modern engine parts and emissions equipment. It will not harm seals, gaskets, catalytic converters, or oxygen sensors when used according to directions.

• Safe for gasoline and diesel engines, including those with emission controls.
• Non-corrosive to rubber and metal components when used as recommended.
• Widely used by professional mechanics to diagnose and treat performance issues.

How do I dose Sea Foam SF-16 for best results?

Dosage varies by application: small amounts for preventive fuel treatments and larger proportions for serious cleaning or oil treatment. Follow the product's instructions for vehicle type and tank size to get the intended cleaning or stabilizing effect.

• Typical fuel treatment: add a measured portion per tank to clean injectors and carburetors.
• For oil system cleaning: add when changing oil and run the engine before draining.
• Use a full bottle for heavy cleaning jobs or multiple smaller doses for maintenance.

Who is this for: Sea Foam SF-16 Motor Treatment (Pack of 2) suits DIY enthusiasts, fleet managers, and professional mechanics who want a versatile, long-standing product to clean fuel injectors, carburetors, and internal oil deposits. It’s also useful for seasonal equipment storage, fuel stabilization, and anyone seeking to diagnose or reduce engine performance issues without risking modern emissions components.