Was: question about oil filter change, now: different question about oil filter change

[gforbess at attglobal.net (Gordon Forbess)]

On Sat, 9 Jul 2005 15:32:36 -0700, "Larry Fry" <rocco16@sbcglobal.net>
wrote:

>I would be quite surprised if the Fram does NOT have a pressure relief 
>valve.
> Either way, the lack of a PRV would not deter me from using a particular 
>filter.  That valve is there to allow oil to bypass/flow through the filter 
>in the event the filtering media was clogged with particulates.  My guess is 
>that it would take upwards of 30,000 miles on a filter to achieve that 
>state.

You're right about the PRV.  What the Fram doesn't have is the
anti-backflow valve that the Mahle and Mann do.  I found (or was
referred to) this page a while back:

http://minimopar.knizefamily.net/oilfilterstudy.html

and

http://minimopar.knizefamily.net/oilfilterstudy-german.html


Gordon
75 Mk I/Drake 1.9
http://pws.prserv.net/gforbess/scirocco/scirocco.htm