I just found out my mechanic friend - trustworthy but not specialized in
VW's - changed my tranny oil last June and used GL5.  He used a synthetic
supposedly good for 200k miles.  I have read the warnings about the problems
with GL5 (was it sulfur compounds which attack bronze components?), but
don't know if that is also true of synthetic GL5 as with dino GL5.  Any
knowledge out there, and advice about whether I should get this stuff out
ASAP and replace it with the beloved Redline MT90?  Or if I am ok to wait
til warm weather?

Thanks,
Jim Creech
87 Westy GL, 2.1