How much Sea Foam in a 2003 Ford Expedition XLT 5.4? [SOLVED]

I have a 2003 Ford Expedition XLT 5.4. How much do I need to add? It has about a 25 gallon tank.

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Jim D.
Jim D.
2 months ago

Thanks for the question, Don. Here’s what I’d do:

  • wait until you have a low tank (1/8 to 1/4 tank or so)
  • add a full 16 oz can of Sea Foam Motor Treatment. High Mileage would work great as well.
  • drive at least 20 miles
  • refill with fresh fuel

The high concentration of Sea Foam does a great job cleaning. Adding it to a low tank will make it work much better and quicker than if you add it to a full tank. It’s the best way to make the most out of a can. Hope that helps!