according to the syncro.org site, redline recommends mt-90 for
high-temperature operation in the transaxle.  i will soon be changing out my
tranny oil, and volkscafe stocks the mtl only.  can anyone who operates a
syncro in a high-temperature environment (i.e., the desert southwest, the
intermountain west, the gobi desert), or anyone else, tell me if the mtl is
going to be enough for a hot, long trip this summer?  is that difference
between 75w80 and 75w90 all that much?

note that "normally" our van is driven in cooler, rather than particularly
hot, temperatures.

thanks.
bill
'87 syncro westfalia
http://www.scruznet.com/~kasper/pics/westy/