Hi Tom,

Thanks for the question! No, Sea Foam in your gas tank won’t harm your catalytic converter. (It won’t clean it, either, which is another question we get often).

Tip: to get the most out of a can of Sea Foam, consider using a high cleaning concentration. 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.

Yes, you can use Sea Foam Motor Treatment in your 2024 Honda Pioneer. Add at least 2 oz per gallon of fuel. It’ll work to clean and lubricate critical engine areas, prevent fuel from degrading when it’s not in use, and help prevent fuel-related engine problems.

Tip: once in a while (once a season or so), add an entire 16 oz can of Sea Foam to about 2 gallons of fuel (a low tank) and run it until almost empty before refueling. The high concentration will do a great job cleaning.

Hope that helps and let me know if you have any other questions!

Hi Destiny,

Thanks for the question! Yes, you can add Sea Foam Motor Treatment to the fuel tank if there’s already another additive in there. It’s safe and effective.

Tip: if you can, wait until you have a ¼ tank, add an entire 16 oz can of Sea Foam, and drive until almost empty. That will create a strong cleaning concentration and is the best way to clean with Sea Foam.

Thanks for the question!

For Sea Foam in the gas tank or oil crankcase, it does not matter if the engine is hot or cold. In the gas tank, Sea Foam will clean and lubricate as the treated fuel is drawn through the fuel system. In the oil crankcase, the Sea Foam will circulate and clean as the engine runs.

The best time to add Sea Foam to the gas is when you’ve got about 1/4-1/8 of a tank left. Add an entire 16 oz can, drive until it’s almost empty, and then refuel as normal. The high concentration works very well to clean.

The best time to add Sea Foam is 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. Add 1 ounce of Sea Foam per quart of oil.