Silica! From dust and sand. While filters trap some stuff on the surface the
smaller stuff can eventually work through. As stuff makes its way into the
combustion chambers some of it gets past the rings and into the crankcase
oil. The oil filter again can only handle so much and catch stuff so small.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Timmy Evens
Sent: Thursday, June 06, 2013 11:56 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Silicone in oil analysis

Quick question: why does poor air filtration result in higher levels of
silicone in your oil? Where's this silicone coming from?

Tim

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