As for quality, (consistency, good design, heavy duty construction) both the
Mann and Mahle filters are quality products. I do not wish to put them down.
Where those products fall short is their ability to maintain adequate
filtration for extended oil drain intervals. In a number of vehicles
including mine is results were wear metals and silica would reach
unacceptable levels in less than 7,500 mile intervals. I have also done some
experiments changing just the filters to see if new filters would clean
things up. Both the Mobil 1 brand and the Fram Tough Guard have shown
consistent ability to clean up an engines oil to acceptable levels. I am
sure that both of these companies now offer premium products ( better filter
media) but I have yet to see them available here. Maybe someone out there
can get us the good stuff.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Alan Felder
Sent: Wednesday, January 13, 2010 12:20 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Motor Oil (Synthetic)

Dennis - I have an 82 Diesel and have purchased MANN oil filters for my next
few changes.  I noticed you mentioned MANN and MAHLE filters twice,
inferring "do not use".  I have always thought of these as being quality
filter manufacturers.  What are the reasons for not recommending them, or am
I reading your statements incorrectly?

On Tue, Jan 12, 2010 at 11:13 PM, Dennis Haynes
<d23haynes57@hotmail.com>wrote:

> some point we have a thermal run away. On the 2.1L engines the oil cooler
> was added to help this and dynamic oil pressure warning system detects
this.
> No a Mann or Mahle filter does not fix it.

> 50. My 1988 Fox can go as high as 14,000 miles with good filters,(not Mann
> or Mahle). The Vanagon oil tends to need replacing due to nitration, (high
> ring temps
>
> --
> Alan Felder
> Austin TX
> 82 Diesel Westy
>