i am a FIRM Beliver in strictly AC delco....that is the only thing that has been put on the car for 13 years now

Ditto. When I go in the parts store I stock up on PF47'* and PF52'*. Thats all I'll use, so when they have 'em I make sure I get them. All the L27/L36/L67 cars we have take PF47'* and the 3.1'* all take the PF52.

I've never heard anything good about Fram filters from anyone who has ever done any testing on them.

Shawn

My 3800 II in the '99 lesabre runs about 60 PSI oil pressure most of the time. That could vary by as much as 10 psi for reasons i don't know, but mostly, 60.

I use those stupid Fram filters most of the time, I need to break that cheap habit.

Oil? Valvoline 10 W 30.

Yes, you are right Don. I buy the PF52 whenever possible. It'* about 3/4" longer than the PF47.

The oil presure variation is due to the fact you are using a Fram oil filter; quit being cheap, put an AC Delco and you will see the pressure variation go away.

Don i believe they are exactly the same except for the lenght..... BUT i never run a filter that is not recommended for the car....if GM wanted a 52 on there they would have put one on there....since they didnt i only use a 47...i understand the the 52 has the 'possibility' of more filtering but i would NOT recommend the larger filter

Hay Turbo5
Don’t know about you but I prefer a PF47 over the PF52.
In a good oil filter fight the PF47 is much easier to throw than the PF52.


There seams to be two legitimate AC Delco oil filters Champion and Delphi.
Pictures are here. http://www.lesabret.com/filters/filter.html

So far I have only seen the Champion version sold at AutoZone.

Very good comparison article Ron.

I'll never use Fram again.