A friend of mine did add a bypass oil filter to his Rabbit and did a similar
run of tests.  His was a gas engined car and went 100K before he had to
change the oil.  Keep in mind, when changing the filter media once per year,
you add some oil which helps it along and you increase the crankcase volume
by about 2 quarts which also helps it go the distance.  This is still
remarkable.
TEMiller
----- Original Message -----
From: "David Brodbeck" <gull@GULL.US>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Wednesday, June 02, 2004 11:10 AM
Subject: Re: Synthetic oils in the vanagon

> On Tue, 1 Jun 2004, Doug in Calif wrote:
>
> > You also go on and on about the longevity of synthetics when used with
> > high filtration by pass filters. No argument from me.  Are you not
> > forgetting the point of discussion is synthetic oils in the vanagon? The
> > vanagon has no such added by pass high filtration for the oil...
>
> Neither does his Rabbit.
>
> With all respect, Doug, Tom has actual test data from a lab to back up his
> claims.  What do you have?  I like numbers, not anecdotes, not information
> from an owner's manual written before synthetic oils existed.
>
>
> David Brodbeck, N8SRE
> '86 Volvo 240DL wagon
> '82 VW Vanagon Westfalia Diesel
>