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
When you say add 1 part Sea Foam to 2 parts fresh gasoline, do you mean the normal gas/oil mix or just straight gasoline?
Good question, Lou.
We mean the normal gas/oil mix (for a 2-stroke).
Sea Foam is not a 2-stroke oil substitute.
Can I use Sea Foam treatment before EPA state air quality test?
Thanks for the question! Yes, you can use Sea Foam leading up to your emissions test. Make sure to read the article below (and watch the video near the end). That’ll help explain what Sea Foam can and cannot help with for emissions tests
https://seafoamworks.com/use-sea-foam-to-help-pass-emissions-tests/
I have a full 60 gallon tank of gasoline in my boat. Can I add Sea Foam to the full tank?
Hi Charles,
Thanks for the question! Yes, you can add Sea Foam Motor Treatment to your 60 gallon tank. Add 1 ounce per gallon of fuel. You can get 1 gallon jugs of Sea Foam Motor Treatment at most auto parts stores. Adding it to a full tank of fuel will prevent the fuel from degrading and prevent gum and varnish from forming while it sits. It’ll also clean and lubricate the entire fuel system. It’s a good preventative maintenance measure for every tank and a good way to keep the engine running well and prevent problems.
If you want to run a strong cleaning concentration periodically, wait until you have a low tank of fuel (1/8 tank or so) and add three or four 16 oz cans of Sea Foam. Run it for at least 20 minutes if you can (just don’t run out of fuel) to give the treated fuel a chance to clean.
Hope that helps and let me know if you have any questions!
Best,
Conner
Sea Foam
Will adding Sea Foam to my gas harm my 2021 Camry engine or sensors?
Thanks for the question!
No, Sea Foam will not harm the engine or sensors in your 2021 Toyota Camry. Just follow the directions on the can.
Sea Foam is made from a mix of petroleum-based cleaning and lubricating ingredients. When added to fuel, it works to clean fuel residues and deposits from the fuel system.
Here’s what I’d do to get the most cleaning power out of a can:
- Wait until the tank is low (about 1/4 tank or less)
- Add a full 16 oz can of Sea Foam
- Drive at least 10–20 miles before refueling
The high concentration works much better and faster than adding it to a full tank.
Many people use Sea Foam as preventative maintenance to keep the fuel system clean and help prevent deposits from building up over time.
Hope that helps and let me know if you have any other questions!
Is Sea Foam good for an ’87 chevy square body’s engine?
Thanks for the question!
Yes, Sea Foam products are safe to use in an ’87 Chevy Square Body.
If you’re asking about Sea Foam Motor Treatment, you can use it in both the fuel tank and the oil. It will work to clean fuel residues, gum, and varnish in the fuel system, and clean oil residues and deposits in the crankcase.
If you’re asking about Sea Foam Spray, it’s also safe to use on that engine for upper engine cleaning. Just follow the directions on the can.
Those older carbureted Chevy engines are actually great candidates for Sea Foam because fuel gum and varnish is a very common cause of rough running, hard starting, and poor performance as they age.

Jim D.TECH
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