[200q20v] Re: GL4 lubricant choice

Glen Dustin Powell gpowell at ennovatenetworks.com
Mon Dec 11 08:55:29 EST 2000

"Mobiltrans SHC 50 meets the API MT-1 EP gear oil service classification and
is suitable for transmissions and gear cases where API GL-1 through GL-4
protection is required. It is NOT suitable for hypoid gear applications of
differentials and final drives....."

Seems a contradiction. They claim GL4 compliancy, but say no-can-use in
final-drives, but Audi specifies GL4...?

Is this a mere nit to pick? Are we simply beating the dead horse's bones
into ever finer dust?



  -----Original Message-----
  From: 200q20v-admin at audifans.com [mailto:200q20v-admin at audifans.com]On
Behalf Of WARATAP at aol.com
  Sent: Friday, December 08, 2000 6:29 PM
  To: pwaterloo at compuserve.com; 200q20v at audifans.com
  Subject: [200q20v] Re: GL4 lubricant choice

  Look what I found. Please forgive the wordiness (I copied it straight off
  sight;-)   Maybe this is the one you should consider if you're thinking
  Mobil Synthetic, especially when you look at the application data.
  While I'm interested, I have no vested interest.


  '91 200q20v with a few mods...

  Click here: Mobil ATF, Grease and Gear Oil

  Mobiltrans SHC® 50

  Product Description

  Mobiltrans SHC 50 is a synthetic, heavy-duty SAE 50 gear oil manufactured
  from a blend of synthesized hydrocarbons and carefully selected esters.
  additive system provides outstanding high-temperature detergency and
  wide-temperature dispersancy with optimized protection against thermal
  degradation and oxidation, wear, and corrosion.

  Mobiltrans SHC 50 is formulated to provide maximum performance in truck
  other commercial transmissions where a high-quality engine oil formulation
  preferred over a sulfur-phosphorus high-EP gear oil. In those
  Mobiltrans SHC 50 provides maximum stability at high temperatures to
  carbon deposits and prolong seal life. It will not corrode copper and its
  alloys, thereby providing maximum protection for gear synchronizers.

  Mobiltrans SHC 50 has the same viscosity as most SAE 50 engine oils and
  90 gear lubricants at the high end of the temperature-viscosity scale.
  However, because of its inherently higher viscosity index and unique
  molecular structure, it provides a better protective film at higher
  temperatures than conventional oils, without the addition of VI improvers.
  is completely shear stable and retains its film strength even under the
  severe mechanical shearing encountered in automotive manual transmissions
  other non-hypoid gear applications. At low temperatures, the product
  an extremely low pour point of -51°C (-60°F) and remains fluid without
  channeling at subzero temperatures.


  Mobiltrans SHC 50 is recommended for year-round lubrication of automotive
  manual transmissions in light-duty to extremely heavy-duty on-highway
  vehicles and off-highway equipment. This includes subzero conditions in
  arctic climates and operations requiring lubricants with relatively high
  viscosity and good load-carrying ability. Eaton and Rockwell transmissions
  specify heavy-duty API CD engine oils exclusively if normal or extended
  drains must be maintained. Mobiltrans SHC 50 is a fully approved Eatonª
  Roadrangerª quality lubricant. It is designed for transmissions covered by
  the Eaton Roadranger and Rockwell extended warranties of 750,000 miles,
  oil drains of 500,000 miles. It is, also, approved by Mack against its new
  T0-A+ 500,000 mile extended service specification.

  , either for topping-off or refills, where API
  GL-5 or MIL-PRF-2105E multi-purpose lubricants are specified.

  Mobiltrans SHC 50 is ideal for extremely low- and high-temperature
  applications. It provides outstanding thermal stability, deposit control,
  seal protection exceeding the proposed PG-2 performance level. It provides
  excellent FZG gear protection in stages 1 through 11. It also provides
  outstanding CRC L-60 gear oxidation and thermal breakdown deposit

  Mobiltrans SHC 50 is a good companion for Mobilube SHC 75W-90 and 80W-140
  fleets converting manual transmissions and rear axles to synthetic
  for gear life filling (500,000 miles).

  It provides maximum protection, all-weather performance, and a fuel
  advantage of up to three percent when used in conjunction with a synthetic
  rear axle lubricant. Mobiltrans SHC 50 also can be used as a companion to
  Mobil Delvac 1 in a synthetic lube package for fleet applications.
  Typical Characteristics

  Physical characteristics shown in the table are typical and may vary

  Mobiltrans SHC 50
  Product Number 51111-3
  SAE Number 50
  Gravity, API 30.0
  Pour Point, °C (°F) -51 (-60)
  Flash Point, °C (°F) 228 (442)
  Viscosity, cP at -40°C cSt at 40°C
  cSt at 100°C 140,000
  Viscosity Index 148
  Sulfated Ash, wt % 1.0
  Zinc, wt % .015
  TBN, ASTM D 2896 7.0
  Copper Strip Corrosion, 3 hr at 250°F 1A
  ASTM Foam, Seq 1, 2, 3 0/0,0/0,0/0
  FZG Rating, 11 Stages Pass
  CRC L-33, Moisture Corrosion Pass
  CRC L-60, Thermal Stability, 300 hr Excellent
  Rust Test, ASTM D 665 Pass
  Four-Ball Wear, Scar Dia, mm, ASTM D 2266 0.26
  Eaton Roadranger Extended Warranties Yes
  Eaton Roadranger Extended Drain (500K miles) Yes
  API GL-4 Performance Yes
  Mack T0-A+ (500,000 mile) Yes


  Mobiltrans SHC 50 offers these advantages and benefits:

  Excellent load-carrying, antiwear, and EP performance for manual
  Outstanding protection against deposits on seals, resulting in longer seal
  Maximum protection against corrosion of copper and its alloys thereby
  protecting gear synchronizers
  Control of high-temperature deposits
  Outstanding low-temperature fluidity with pour of -51°C (-60°F)
  Extended drain capability with Eaton Roadranger and Rockwell extended
  Fuel economy
  Health & Safety

  Based on available toxicological information, is has been determined that
  this product poses no significant health risk when used and handled
  Information on use and handling, as well as health and safety information,
  can be found in the Material Safety Data Sheet which can be obtained from
  your local distributor; via the Internet on http://www.mobil.com; or by
  calling 1-800-662-4525 and selecting prompt 2.

  For additional technical information or to identify the nearest U.S. Mobil
  supply source, call 1-800-662-4525.

  Exxon Mobil Corporation
  3225 Gallows Road, Fairfax, Virgina 22037-0001 Mobiltrans SHC® 50
  PDS A-26 5398040 (08-31-98)
  ° Copyright 1986, 1990, 1994, 1996, 1998. All rights reserved.

  Due to continual product research and development, the information
  herein is subject to changes without notification.


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