HOW TO USE SEA FOAM MOTOR TREATMENT IN FUEL
BENEFITS
applicationS
treatment recommendations
SUMMARY
Pour Sea Foam in your fuel tank to clean and lubricate your entire fuel system. It works through fuel injectors and carburetors to remove harmful residues and deposits from fuel passageways, intake valves, pistons, and chamber areas.
For cleaning a gasoline or diesel fuel system, it’s safe to add more Sea Foam to fuel. In fact, the more Sea Foam you add to fuel, the better it cleans!
Made from petroleum ingredients, Sea Foam is safe and effective when used in all types of gasoline or diesel fuels and fuel blends. Sea Foam does NOT contain harsh detergent or abrasive chemicals that can harm your engine or fuel system components.

HOW TO USE a high concentration of SEA FOAM
mOTOR TREATMENT IN FUEL
RELATED QUESTIONS
How long to drive once Sea Foam is added to a quarter tank of gas?
Good question, Ed. Drive it until it’s almost empty, or at least 20 miles if you’re more comfortable with that. You want to make it through most of the treated fuel before you refill the gas tank.
My ’04 Nissan Titan has been sitting since before winter waiting on a brake job to be finished. I’m worried about the gas in it. I was told I could have some Sea Foam to it and it would help stabilize it and help minimize any broken down products from clogging up my fuel system. Do you think I can add it to the gas that’s already in there and run it?
Good question. If it’s been sitting since last fall or so, the fuel should have enough volatility to start and run just fine. However, Sea Foam won’t “restore” fuel volatility. It will help prevent any further breakdown, as well as reliquefy any fuel residues and varnish that have formed in the tank.
If you can drive it, here’s what I would do: I would drive it until almost empty, then add a can or two of Sea Foam with two gallons of fresh fuel. Then, drive the truck for at least 20 miles before refueling. That way you have the old gas purged out, followed by a high concentration of Sea Foam working through the fuel system to clean away any gum/varnish residue that would have formed while the truck sat.
If it’s going to be sitting for a while longer, go ahead and add a can of Sea Foam, and then follow the above when it’s ready to go.
Note: High Mileage Motor Treatment would be a good option too. It’s a strong cleaning formula for higher-mileage vehicles.
Does Sea Foam have ethanol in it?
I’m trying to clean out my injectors. Can I add 3 cans to my gas tank?
Thanks for the question, Laura. Yes, you can add multiple cans of Sea Foam. I’d wait until you have a low tank (2-4 gallons) and add a can or two of Sea Foam (or Sea Foam High Mileage, which is a great cleaner.) Then, drive it until almost empty before refueling.
Using a high concentration is a great way to clean up fuel injectors. It wouldn’t hurt anything to add three cans, but it’s probably not necessary.
What is the difference between Sea Foam and Sea Foam Spray?
Thanks for the question, Shahid! Here’s the difference:
Sea Foam Motor Treatment:
- How to use it: pour it in your fuel tank or oil crankcase
- What you can use it in: any gas or diesel engine. It’s safe and effective in any kind of gas or diesel fuel, and any kind of motor oil.
- What it does: cleans fuel and oil residues to help your engine run cleaner, run better, and last longer
Sea Foam Spray:
- How to use it: apply it through a gas throttle body or carburetor
- What you can use it in: gas engines only. Particularly useful in gasoline direct injection engines. NOT for use in diesel.
- What it does: Sea Foam Spray is an aerosol version of Sea Foam Motor Treatment. Sea Foam Spray works through a gas engine’s upper air intake to dissolve harmful deposits and residue buildup from intake runners, intake valves, and combustion chamber areas. It’s especially helpful for cleaning intake valves in gasoline direct injection engines (GDI).
In short, both products will clean critical engine areas to help your engine run better and last longer.
Jim D.TECH
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