PF-44 Oil Filter
Thread Starter
Racer
Joined: Feb 2005
Posts: 270
Likes: 8
From: O'Fallon Illinois
PF-44 Oil Filter
I just changed the oil for the first time on my new-to-me 2001 coupe. I was surprised to find a PF-46 oil filter installed. I thought the LS1 took a PF-44? Is the PF-46 the same or a little longer? I noticed that the tune up kit sold by the Forum lists a 44 but the picture shows a 46.
What gives?
What gives?
Le Mans Master
Joined: Nov 2001
Posts: 6,984
Likes: 0
From: Central Coast CA
The PF46 filter media is better and the reason it replaced the PF44.
Funny thing is the C4's LT1 used the PF52. It's a longer filter than the PF44, PF46 or UPF44. The openings on these filter are tad bigger than the PF52 but it has less filter media area. Does this mean the PF52 was overkill?
Funny thing is the C4's LT1 used the PF52. It's a longer filter than the PF44, PF46 or UPF44. The openings on these filter are tad bigger than the PF52 but it has less filter media area. Does this mean the PF52 was overkill?
Racer
Joined: Apr 2004
Posts: 391
Likes: 7
From: Garland Texas
You guys might find my post on the http://forums.corvetteforum.com/show....php?t=1043634
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Drifting
Joined: May 2003
Posts: 1,755
Likes: 97
From: Sandy Utah
I bought a case of UPF-46's from GM parts direct. I have been told that the 46's are superior to the 44's in the filter medium dept but have not seen a definitive, objective test. Since the General went to the 46's, I did too. 
Le Mans Master
Joined: Nov 2001
Posts: 6,984
Likes: 0
From: Central Coast CA
Originally Posted by Cirrus8
I bought a case of UPF-46's from GM parts direct. I have been told that the 46's are superior to the 44's in the filter medium dept but have not seen a definitive, objective test.
Le Mans Master
Joined: Nov 2001
Posts: 6,984
Likes: 0
From: Central Coast CA
I thought the biggest change was the filtering media? I'm looking at a PF46 filter right now and don't see an anti-drainback valve in it. So I don't think they have them. It wouldn't be needed anyway, the filter is mounted vertically.
