[200q20v] Re: GL4 lubricant choice

WARATAP at aol.com WARATAP at aol.com
Fri Dec 8 18:29:00 EST 2000

Look what I found. Please forgive the wordiness (I copied it straight off the 
sight;-)   Maybe this is the one you should consider if you're thinking about 
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...

<A HREF="http://www.mobil.com/mobil_lubes/lubes/index.html">Click here: Mobil ATF, Grease and Gear Oil</A> 

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. The 
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 and 
other commercial transmissions where a high-quality engine oil formulation is 
preferred over a sulfur-phosphorus high-EP gear oil. In those applications, 
Mobiltrans SHC 50 provides maximum stability at high temperatures to prevent 
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 SAE 
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. It 
is completely shear stable and retains its film strength even under the most 
severe mechanical shearing encountered in automotive manual transmissions and 
other non-hypoid gear applications. At low temperatures, the product offers 
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, with 
oil drains of 500,000 miles. It is, also, approved by Mack against its new 
T0-A+ 500,000 mile extended service specification. 

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 gear 
protection is required. It is NOT suitable for hypoid gear applications of 
differentials and final drives, 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, and 
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 protection.

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

It provides maximum protection, all-weather performance, and a fuel economy 
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 slightly.

    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 transmissions
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 properly. 
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 <A HREF="http://www.mobil.com/">http://www.mobil.com</A>; 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 contained 
herein is subject to changes without notification.  


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