Barry,

Try this site http://gti16v.org/tb879503.htm.  This is the VW Technical
Bulletin on r-134a conversions.  I believe it has all the info you need.

Chuck
'85 Wolfsburg Westy - 'Roland the Road Buffalo'

In a message dated 7/3/02 6:13:02 PM, LISTSERV@GERRY.VANAGON.COM writes:

>Date:    Wed, 3 Jul 2002 18:26:41 EDT
>From:    Barry Rokusek <Westfalia86@AOL.COM>
>Subject: R-134a and lube amounts... PLEASE HELP!
>
>Hey.  I'm sorry to be so dramatic, but I'm meeting the mechanic Thursday
>evening to charge up my AC.  And I still don't know how much I R134a and
>lube
>to use...  I've changed o-rings, dryer....  VW says 47.6 ounces and 5.8
>of
>lube.  That's about 94% of what the R-12 was.  Others say 80%.  I have
>an 86
>Westy with the Sanden 508 compressor.  I'd really appreciate any advice!
>
>Thanks,
>
>Barry
>
>Madison, WI