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 much Sea Foam can I place directly into a chainsaw or a weedeater?
Thanks for the question!
You can safely use Sea Foam in both a chainsaw and a weedeater. The amount you add depends on what you’re trying to achieve:
For regular use / preventative maintenance: Add 2 ounces of Sea Foam per gallon of fuel. This will prevent gum and varnish from forming as well as prevent the fuel from degrading.
For a strong cleaning (if it’s running rough or hasn’t been cleaned before): Create a high cleaning concentration with something like the following ratio:
- 8 oz of Sea Foam in 16–32 oz of fuel (up to a 1:2 ratio of Sea Foam to gas)
Run the engine for a few minutes to pull the treated fuel into the carburetor, then let it sit and soak overnight. After that, run it as normal. The high concentration works very well to clean varnish and residue from small engine fuel systems.
It’s safe to use a lot of Sea Foam in small equipment like that and it works well to clean.
How many ounces of Sea Foam to a 23 gal gas tank?
Thanks for the question!
For preventative maintenance in a clean engine, our general recommendation is 1 ounce of Sea Foam per gallon of fuel, so for a 23 gallon tank that would be about 23 ounces if the tank is full.
For cleaning, I’d recommend adding more Sea Foam per gallon. Here’s what I’d do to get the most cleaning power:
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Wait until the tank is low (about 1/4–1/8 tank).
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Add a full 16 oz can of Sea Foam.
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Drive 10–20 miles (or as normal) before refueling.
The idea here is to create a high cleaning concentration, which works better and faster than adding a small amount to a full tank. It’s safe to do and very effective at cleaning fuel residues and deposits.
Hope that helps and let me know if you have any other questions!
Best,
Conner
Sea Foam
Can I use Seafoam Motor Treatment to stabilize fuel over the winter in a 2025 Hyundai Palisade?
Thanks for the question. Yes, you can use Sea Foam Motor Treatment for storing your Palisade over the winter. It’ll prevent fuel from degrading, preserve ignition vapors, and prevent fuel gum and varnish from forming while it sits. I’d add a can or two of Sea Foam to the fuel tank and be sure to drive it (25-50 miles) at some point before you store it so the treated fuel gets drawn through the system.
Can I add Sea Foam to 2 stroke gas?
Can I use Sea Foam in the fuel tank on a 2003 7.3 Powerstroke?
Thanks for the question, Frank. You can use Sea Foam in your 2003 7.3 Power Stroke, or any diesel for that matter. 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. (The idea is to drive and use as much of the treated fuel as you can/as you’re comfortable with before refueling). It’s safe to add a high concentration like that and it works very well for cleaning fuel residues and deposits.

Jim D.TECH
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