What really matters is the results. What is the actual effectiveness of
the filter, in your engine? Oil testing will tell you. Everything else is
non sense. Oil testing can be done for as little as $15. With it you will
learn the following:
Do I really need to change the oil this often? Why?
What contaminants are getting in it?
Is there any antifreeze leaking in there.
Is the oil maintaining viscosity?
Is it breaking down?
Is my engine wearing prematurely?
Is unburned fuel washing past the rings?

Etc.

I no longer use Mann or Mahle filters. Fram "Tough Guard" and the Mobil
"1" are proving their worth. I will be trying others.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Todd Last
Sent: Wednesday, August 27, 2008 12:06 PM
To: vanagon@GERRY.VANAGON.COM
Subject: NVC - Good article on technical analisys of engine oil filters

<http://findarticles.com/p/articles/mi_m0BQH/is_6_49/ai_n16547364>

http://findarticles.com/p/articles/mi_m0BQH/is_7_49/ai_n26972065

Engine oil filters : technical and empirical evaluations of anti-drain
back systems and element tubes</a>
Outdoor Power Equipment, June, 2006, by Paul Dilger, parts 1 and 2

Unfortunately the articles have the photos omitted, bit it is interesting
none the less.

Todd
'88 Westy