· Super Moderator
I got a Ford primary filter out and it has 3 green orings, one is visible at the base area and the other two are on the drain valve and are not visible unless it is unscrewed. Are one of these the second one you mentioned?Just changed mine 2021 at 20k miles. pretty close to black definitely dirty . I used Doc's Diesel kit. I noticed their upper filter is plastic vice metal. . Frame mount filter had a second green smaller o ring around the insert end where the factory one did not ?