I ran my first Fleetguard (LF697) on my motorhome. After 4400 miles I found the antidrainback valve leaks. Not a problem as the filter mounts about 30 degrees downward. I thought it might be a fluke or a piece of crud in the valve, though on dissassembly the valve did not appear as well made as others, like Purolator. It did not have the support ribs. Anyway, ran the next LF697 on the F150 which mounts sideways, figuring if it fails I can pull it and put a Purolator on. Well, after about 700 miles on cold start it now takes several seconds for oil pressure to register (real mechanical gauge). This has happened twice. So I guess I better pull it and go back to Wix, Purolator, Motorcraft filters.