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 how much Sea Foam do you put in a F250 2018 diesel?
Thanks for the question, Michael.
Here’s what I’d do:
- Sea Foam Motor Treatment in fuel. I like to wait until the tank is low (1/4 -1/8 tank), add the whole 16 oz can, and then drive for at least 10-20 miles before refueling. It’s safe to add a high concentration like that and it works very well for cleaning fuel residues and deposits. Add it to fuel like this every 3,000 miles or once a year.
- Sea Foam Motor Treatment in oil. Add 1 ounce of Sea Foam per quart of oil in the crankcase. We recommend adding it 100-300 miles before your next oil change. That gives the Sea Foam enough time to circulate and clean, and it allows all the reliquefied oil residues to be drained away with the old oil. To help progressively clean up your oil crankcase, add it before every oil change.
Will Sea Foam work on a 2004 Mercury mountaineer?
- Sea Foam Motor Treatment in fuel. I like to wait until the tank is low (1/4 -1/8 tank), add the whole 16 oz can, and then drive for at least 10-20 miles before refueling. It’s safe to add a high concentration like that and it works very well for cleaning fuel residues and deposits. Add it to fuel like this every 3,000 miles or once a year.
- Sea Foam Motor Treatment in oil. Add 1 ounce of Sea Foam per quart of oil in the crankcase. We recommend adding it 100-300 miles before your next oil change. That gives the Sea Foam enough time to circulate and clean, and it allows all the reliquefied oil residues to be drained away with the old oil. To help progressively clean up your oil crankcase, add it before every oil change.
How much Sea Foam in a Tecumseh 8hp snowblower engine?
Thanks for the question, Bill.
If you’re asking about oil, add 1 ounce of Sea Foam per quart of oil.
Here’s what I’d recommend for adding it to fuel:
- If the engine isn’t running well, use a strong cleaning ratio (up to a 1:2 ratio of Sea Foam to gas). Run it until empty (using it as normal). That will do a good job cleaning up any gum or varnish in the fuel system that might be causing problems.
- If you’re using it for regular preventative maintenance, use 2 oz of Sea Foam per gallon in every tank. That will prevent gum and varnish from forming and the gas from degrading while it’s not being used.
Hope that helps and let me know if there’s anything else!
Will Sea Foam work on a 2017 Chevy Malibu hybrid?
Can I add Sea Foam with other fuel additives at the same time?

Jim D.TECH
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