Using Sea Foam in oil – how long? [SOLVED] Asked by Pat K. In Indiana How long after adding Sea Foam to oil do you change the oil?
Hi Pat. We recommend adding Sea Foam to oil 100 to 300 miles before the end of each oil change interval. Just know that you can add any time during the interval as long as you drive at least 100 miles to allow Sea Foam enough time to circulate and clean. Hope this helps!