The thread you mentioned is precisely why I replaced my Wix filter. Went with K&N.I was running Napa gold (WIX). I am now rebuilding my engine due to lost oil pressure. Was it the filter? Maybe. I'll never know. But I also read another thread on here a couple weeks ago ( I'd have to try and find it) With at least 2-3 other members running Napa Gold's who lost oil pressure and are now rebuilding. Pretty sure I'll just run Toyota now.