Hello,

Both Redline MTL (75w80) and MT-90 (75w90) are GL4 rated
synthetics and will work just fine.  The VW G50 synth gear oil
is 75w90.  If you live in colder climates or have a high mileage
trans thats balky about going into gear (especially 2nd in the
morning!) then you might consider the MTL.  This is my view
on it and has worked for me in the past-YMMV.  When in
doubt follow the directions from Redline or VW and you should
be OK.

-Todd Hill
 VolksWerks Transaxles
 Olympia, WA
 360-412-0948