Leaving Sea Foam Motor Treatment in oil [SOLVED] Asked by Joe F. In New York What happens if I leave Sea Foam Motor Treatment in the oil well past the oil change? (600 miles or 1000)
Good question. You can leave the Sea Foam in the oil for the entire oil interval – it’s safe and will progressively clean the crankcase. As always, change the oil according to manufacturer’s recommendation or if it gets dirty.