Can I add Sea Foam to a full tank of gas? [SOLVED] Asked by Joe P. In Alabama Can I add Sea Foam Motor Treatment to a full tank of gas or should I wait until it’s almost empty?
Great question, Joe. You can add Sea Foam Motor Treatment to your gas tank at any time.
However, adding it to low tank of fuel creates a greater cleaning concentration. I like to add an entire can or two of Sea Foam when there’s less than 1/8th a tank. Then, drive at least 10 to 20 miles to take advantage of the higher concentration before refueling. That’s one of the best ways to use it! Hope that helps!