Originally Posted By: jmb3675
Originally Posted By: dlundblad
Originally Posted By: Falcon_LS
The Motorcraft filter has the pressure relief valve at the inlet, versus at the dome end with other filters. I would stick with the FL-820S on a Ford motor - it's a great filter.
WIX would be the same way.
The Wix replacement for the FL_820s, the Wix 51372/Napa 1372, have a dome end bypass. I used a Napa 1372 for my last oil change on my truck. The start up rattle seemed louder at start up the first few starts, but now it is much quieter and can sit twice as long as it could with the Motorcraft before the start up rattle gets loud. It even sat for a month and did not rattle at start up. I almost pulled it because of the first few starts, but I am glad I didn't. Also it may just be I am so impressed with the quieter starts, but it seems to start easier in the cold also.
I have the FL820S on my 05 expy 5.4 ( use it only for hauling stuff and sit around most of the time ), I do have the rattle sound if I leave it on without start it, just say a week just sit there , it does have the rattle sound. if I drive it every day, it never have the rattle sound when start up. I will use the Wix 51372/Napa 1372 next time.