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
Can you use Sea Foam fuel additive on a 2024 Toyota RAV4 hybrid with less than 11,000 miles?
Thanks for the question, Kim. Yes, you can absolutely use Sea Foam Motor Treatment in your 2024 Toyota RAV4 Hybrid. Just follow the directions on the can.
Even though your RAV4 has less than 11,000 miles, fuel residues and deposits begin forming during normal use of any engine. Many people use Sea Foam as preventative maintenance to keep the fuel system clean and help prevent those deposits from building up over time.
Here’s what I’d do to get the most cleaning power out of a can of Sea Foam:
- 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 (or until nearly empty) before refueling
The high concentration works much better and faster than adding it to a full tank.
For a newer vehicle like yours, one treatment every 3,000-5,000 miles or once or twice a year is a great preventative maintenance routine.
Can you use Sea Foam in a Stihl chain saw?
Hi Harry ,
Thanks for the question! Yes, you can use Sea Foam in a Stihl chainsaw, and any other gas or diesel engine.
For preventative maintenance, add 1 ounce of Sea Foam per gallon of fuel to every tank. That will keep fuel from degrading and prevent gum and varnish from forming. For cleaning the entire fuel system, use a high concentration of Sea Foam – up to a 1:2 ratio of Sea Foam to gas. If you’re experiencing problems with it (or want to just do a really good cleaning), I’d add 4 oz of Sea Foam to 8 oz of gasoline and run it for about ten minutes, shut it off, let it sit overnight, and then run it for a few minutes again the next day. That will do a great job cleaning up any fuel gum or varnish that’s formed anywhere in the fuel system. Gum and varnish is a very common cause of problems in a small engine like that.
By adding a can of Sea Foam to my engine oil or my gas, what will I do for my 2021 Chevy Malibu RS?
Thanks for the question, Rodney. The biggest thing that Sea Foam will do for your Malibu is clean residues and deposits (which form over time in any engine) from your fuel and oil systems. Those residues and deposits often cause common engine problems like loss of fuel efficiency, loss of power, rough idle, and oil burning. The most important thing Sea Foam does is liquefy and clean away those residues so the engine can continue to run its best, or overcome problems caused by a dirty fuel or oil system. It’s a cost-effective and easy form of preventative maintenance.
Here’s what I’d do to get the most cleaning power when adding Sea Foam to the gas tank:
- 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 (or until nearly empty) before refueling
The high concentration works much better and faster than adding it to a full tank.
You can also add Sea Foam to the oil. Add 1 ounce per quart of oil in the crankcase 100-300 miles before your next oil change. Sea Foam will reliquefy heavier oil residues and deposits so they can drain away with the old oil.
Having issues with my carb on my motorcycle. Will Sea Foam help?
Thanks for the question, Adam. Yes, if your motorcycle’s carburetor problems are being caused by fuel gum or varnish (which is very common), Sea Foam can definitely help.
Fuel gum and varnish is the #1 cause of carburetor-related issues like hard starting, rough idle, hesitation, stalling, and poor throttle response. Sea Foam works by liquefying and clearing away those sticky residues from the carburetor and fuel passages.
Here’s what I’d do:
- Add a high concentration of Sea Foam to a small amount of fresh fuel (up to about a 1:2 ratio of Sea Foam to fuel)
- Run the motorcycle for a few minutes to pull the treated fuel into the carburetor
- Shut it off and let it sit overnight
- Start it up the next day and take it for a ride. Run through as much of the treated fuel as possible to get the most out of it.
The high concentration works much better and faster than adding a small amount to a full tank.
Hope that helps and let me know if you have any other questions!
Can I add an ounce or half an ounce of Sea Foam straight to the tank in a weedeater or Chainsaw?
Thanks for the question, Don. Yes, you can add 1 ounce of Sea Foam to your weed eater or chainsaw’s gas tank. It’s okay to use a very high concentration of Sea Foam to fuel – up to a 1:2 ratio of Sea Foam to gas. An ounce (or even a few ounces) added to the fuel tank at every fill up will do a good job cleaning fuel gum and varnish and prevent it from forming.
Hope that helps and let me know if there’s anything else!

Jim D.TECH
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