I guess this supports what I discovered through oil analysis, and if I had not been doing oil analysis I would probably still be a K&N filter fan today. I would not have known any better.

Quote from linked study:

"In 60 minutes the AC Filter accumulated 574gms of dirt and passed only 0.4gms. After only 24 minutes the K&N had accumulated 221gms of dirt but passed 7.0gms.
 
Compared to the AC, the K&N“plugged up” nearly 3 times faster, passed 18 times more dirt and captured 37% less dirt. See the data tables for a complete summary of these comparisons. "

Thanks, Tom Hargrave
www.stir-plate.com
www.towercooler.com
www.kegkits.com

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM] On Behalf Of Loren Busch
Sent: Sunday, December 04, 2011 12:15 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Oil recommendations simplified

 RE: K&N Filters
Based on something I found on this (or another VW/Vanagon list) I went to a K&N filter several years ago in my '90 Westy. Because of the comments in the message above, based on hard data, I'm now having second thoughts.  So a quick Google search finds this:
<http://www.nicoclub.com/archives/kn-vs-oem-filter.html>
Again, hard data, not hype or anecdotal evidence.  I think the K&N is coming out (it's due for cleaning anyway) and I'm going back to the stock filters.
And I'm sure there will be a bunch of comments on this both ways, waiting for them.
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