[200q20v] Re, Synthetic Trany oil [M1 75W-90]

Glen Dustin Powell gpowell at ennovatenetworks.com
Fri Dec 8 13:55:41 EST 2000

"Mobil 1 Synthetic Gear Lubricant is suitable for all automotive
applications where lubricants meeting MIL-PRF-2105E, API
Service GL-5, are recommended. It can also be used in rear axles where an
API Service GL-4 lubricant is recommended. It
should not be used in any transmissions requiring an engine oil or automatic
transmission fluid, or GL-4 performance level."

Note the last sentence. That last sentence implies that GL5 does not
supercede and/or is not a superset of GL5 requirements. Wish they offered
more detail on this specifically. Could be a CYA. They do say it
"outperforms all conventional gear lubricants", so if GL4 is offered in a
dino-juice formulation then "outperforms all conventional gear lubricants"
sortah implies that M1 would 'outperform' dino-based GL4.



I use Mobil 1 GL5 75W-90 anyway with 215,000 miles on my ur-q trans and many
miles on the 4KQ road-race car, other quattros, and my antique Poniaction RA
IV 455HO T/A mit Doug Nash 4+1 five-speed with no problems ever observed. I
don't recommend others do this tho... . . . but it werks OK fer me...



  -----Original Message-----
  From: 200q20v-admin at audifans.com [mailto:200q20v-admin at audifans.com]On
Behalf Of PeterBergin at aol.com
  Sent: Friday, December 08, 2000 1:22 PM
  To: 200q20v at audifans.com
  Subject: [200q20v] Re, Synthetic Trany oil

  I recently bought Castor Synthetic GL5 for my 200 from Jim Blau, and was
  that it meets or succeeds all GL4 specs.  I have also been told this from
  another source.  I would like to confirm this before I change all tranny
  diff  fluids soon.  Any one know for sure?  I was also told that GL5 is a
  newer fluid that may not have been in use at the time of our cars

  Thanks for your considerations and thoughts.

  91 Avant
  86 Avant (for sale)
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