The mechanical agitation of the oil due to overfilling results in a mixture
of oil and air, not a layer of foam overlaying the oil in the bottom of the
case.  Try whipping up a container of oil with a portable mixer.

As a result, the oil pump is trying to pressurize the oil/air mixture and
the oil to water heat exchanger is working with a oil/air mixture.  The
effect is twofold; the heat exchanger is not as effective with a oil/air
mixture,so the oil temperature goes up this increased heat and the air
bubbles reduce the viscosity of the oil which results in lower oil pressure
developed by the pump.

Joe

----- Original Message -----
From: "Kenneth D Lewis" <kdlewis@JUNO.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Tuesday, June 26, 2001 9:00 AM
Subject: Re: Oil Level Again

>
> Terry;
>         I'm with you, it doesn't make any sense. Far be it for me to
> deviate from the engineers intent.  But then there's the dozen or  so
> list members that have documented evidence showing otherwise. Things that
> make you go hmmmmmm.
>         I am going today to try and hook up my oil temp gauge. Collect
> some of my own data points.
>
> Good Luck and Drive Safely
> Ken Lewis
> 86 Crewcab,60 356
> http://Neksiwel.20m.com/
>
> On Sun, 24 Jun 2001 06:36:51 -0500 Terry Kay <CTONLINE@WEBTV.NET> writes:
> > Ken,
> >
> > Good thought, but for the life of me,I can't see why if the oil was
> > foaming (aerating)
> > why would this cause the oil to retain BTU's?........
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