How often should I add Sea Foam to my fuel in a 2008 Duramax? [SOLVED]

Thanks for the question, Ricky,

Add it to your fuel tank every 3,000 miles or so to clean (and prevent) fuel residues and deposits. That will work well to prevent fuel-related problems in your Duramax.

To get the most cleaning power out of a can of Sea Foam, wait until the tank is low (2-4 gallons) and add an entire 16 oz can. Then, drive until almost empty before refueling. (If you don’t want to run your tank that low, you can add two cans to a little more fuel…the idea is to create a strong concentration of Sea Foam in the fuel, and then run as much of the treated fuel as possible).

Hope that helps and let me know if there’s anything else!