Volks,
All the talk of coolants sent me off on an Alta Vista research mission
on this matter. A lot of interesting on auto coolant data, which seems
to be nearly exhaustive yet succint, is found in an Australian website:

http://www.prixmax.com.au/press/0001.html

This press release addresses most all of the issues I have seen brought
up on the Vanagon list concerning coolant.
Regards
Mark B. Magee
87GL 80K
Kemah TX USA