Foamy Oil 1998 LS1
Thread Starter
Teching In
Joined: Sep 2016
Posts: 47
Likes: 2
From: Maryland
I’m not trying to hijack this guy’s thread, but my understanding after looking at efficiency results on BITOG is the XP actually has a less restrictive, higher flowing design (albeit less efficient filtration). It’s a synthetic filter vs paper cellulose, and is highly recommended on the sticky here for many years. Someone might want a filter that is more efficient (like the regular Wix) but I’m not familiar with the XP being more restrictive. I’ve never noticed a difference in oil pressure, but I’d love to learn more about that if there’s data that backs it up.
Plenty of reading there, among other places. Cliff notes is the XP is pointless for a performance engine because you're going to fuel foul your oil long before a typical OCI, in addition to the regular filter just being better at actually being a filter.
