Do you need a full tank to use seafoam?
Do you need a full tank to use seafoam? Here's what I'd do: wait until you are at a quarter tank or less, and add a full can of Sea Foam Motor Treatment. Drive at least 20 miles before filling your tank to let the Sea Foam work through the system. How long can you let seafoam sit in an engine? With filter primed, start the engine and let it run for two minutes. Then shut off the engine. Allow five to fifteen minutes for the Sea Foam to soak into the deposit buildup. After the soak period, restart the...