Will Sea Foam work in new gas after draining old gas that’s been sitting for a while? [SOLVED]

Great question, Dannie. Yes, the best case scenario is to drain as much of the old fuel as you can, and then add Sea Foam to fresh fuel and drive it for a while.

Here’s a snippet with instructions from an article about vehicles that haven’t been run in a while:

“Gummy varnish and deposits are a common cause of problems like rough idle, loss of power, or poor fuel efficiency in a car that’s been sitting. Adding a high concentration of Sea Foam Motor Treatment or Sea Foam High Mileage to the fuel tank is an easy way to clean fuel residues and deposits from the entire fuel system. If your engine has been sitting for a long time, here are three steps to get it cleaned up and running well again with Sea Foam:

• Start by draining or syphoning the old fuel from the tank.
• Add 2-3 gallons of fresh fuel and a can of Sea Foam High Mileage to the fuel tank. If you can’t drain all the fuel, you’ll still want to add some fresh fuel to bring back fuel volatility.
• Drive until almost empty (at least twenty miles if possible) before refueling with fresh fuel.”

The Sea Foam will help clean up any gum or varnish that formed while sitting.