My go to filter was the Motorcraft FL820S. I really wanted an answer to the question: “was my go to filter subject to the same problems as the Purolator P1?” So, I decided to start cutting them open to find out for sure. Low and behold the first one I cut open had two nicely developed tears. I then decided to start a cleanup. I purchased a dozen PH820, 6 each WIX 51372 and 6 each AC Delco PF1250 for use on short oil changes. Before I sold the 2004 Ford Ranger / 4L V6, I had switched to Fram TG2 filters and Valvoline AFS. The Ranger was running very well when I sold it. The moral of this story is if you want to know you have to dissect the filter on each oil change. The people who say the FL820S oil filter has issues are absolutely correct. I have used all of the following without issues: Champ PH820, AC Delco PF1250, WIX 51372, NAPA Gold, Fram PH2, Fram TG2 and STP S2.