Thanks for the question, Dave! For routine/preventative maintenance in a John Deere lawn mower, add 1 to 2 ounces of Sea Foam Motor Treatment per gallon of fuel. This will help clean the fuel system and prevent fuel from breaking down.

For occasional cleaning (once a year), use a higher concentration by adding a half can (4 ounces) to a small amount of fuel, like a half-gallon. Run the engine until the treated fuel is used up. This helps clean stubborn fuel residues and varnish.

If you have more questions, let me know! Happy to help.

Thanks for the question, Robert! Sea Foam Motor Treatment lasts a long time. An unopened can will work for decades. Once opened, if the cap is closed tight and the liquid is clear, it will still be fine to use for many years. I’d go ahead and use it.

Here is a video that explains more about the shelf life:
Does Sea Foam Motor Treatment have a shelf life?

If you have more questions, please let us know!

Good question. Yes, soaking engine components or fuel system components (carb parts), transmission parts, and/or hydraulic system parts in a Sea Foam bath is a great way to clean parts.

Start with a slow cooker (crock pot). Either buy a new one for the kitchen (don’t use it for food again after using Sea Foam in it!), or purchase a cheap one dedicated to parts cleaning. Add enough Sea Foam Motor Treatment, High Mileage or Marine PRO to sufficiently cover the parts that need to be cleaned. Add the parts, put the cover on and turn the slow cooker on low or medium for 12-24 hours. After the “cooking time,” remove the parts and gently brush off the loosened contamination with a soft bristle brush or bottle brush to clean the remaining debris off the components. Pipe cleaners work great for small passageways. If there is still more contamination that needs to be cleaned, repeat the 12-24 hour “cooking time” and re-assess the parts. Hope that helps!

Thanks for the question! Here’s a quick rundown of how much Sea Foam Motor Treatment to use in different applications:

• For regular fuel system maintenance, add 1 ounce per GALLON.
• For cleaning, add 2 or more ounces per gallon to a low tank – THE MORE YOU ADD TO FUEL, THE BETTER IT CLEANS!
• For INJECTOR cleaning machines, use 50/50 mixed with gas.
• Use 100% Sea Foam for diesel injector cleaning machines or when priming diesel fuel filters.
• For 2-stroke pre-mix, add 2 ounces per gallon.
• For stabilizing fuel, add 1 ounce per gallon.

You can find that info on our Help Center page here: https://seafoamworks.com/help-center/how-to-use-sea-foam-in-fuel/

Let me know if you have any other questions – happy to help!

Thanks for the question! As long as the cap it on tight, you can store an opened can for many, many years (10+). It doesn’t have a shelf life.