Mobilube™ HD Plus Gear Oil

Extra-high-performance commercial gear oils

Mobilube™ HD Plus Gear Oil 80W-90 and 85W-140 are extra-high-performance commercial gear oils formulated from select base oils and an advanced additive system. These oils are engineered for performance in heavy-duty commercial transmissions, axles and final drives where extreme pressures and shock loading are expected.

Mobilube HD Plus Gear Oil provides excellent chemical and thermal stability at elevated bulk oil temperatures, good performance at low temperatures, and have demonstrated good rust protection resulting from water contamination and wet conditions. Mobilube HD Plus Gear Oil shares common formulations with Esso™ Gear Oil GX 80W-90 and 85W-140.

Mobilube HD Plus Gear Oil is recommended by ExxonMobil for use in:

  • Heavy-duty manual transmissions, axles and final drives requiring API GL-5 and MT-1 level performance
  • On-highway light and heavy-duty trucks, buses, vans and cars
  • Off-highway industries, including construction, mining, quarrying and agriculture
  • Other heavy-duty industrial and automotive applications involving hypoid and other gears operating under conditions where high-speed/shock load, high-speed/low-torque, and/or low-speed/high-torque conditions prevail
  • Initial fill, top-off and refill of enclosed commercial gearing in manual or semiautomatic transmissions where gear lubricants are recommended, including drive axles and final drives

Important: These lubricants are not recommended for applications requiring API GL-4 level performance. They are not intended for transmissions for which engine oil or automatic transmission fluids are recommended.

Please refer to the owner’s handbook for the OEM application requirements for your vehicle or equipment.


Features and benefits

  • Excellent thermal stability and resistance to high-temperature oxidation
  • Good protection against low-speed/high-torque wear and against high-speed scoring
  • Excellent rust, staining, and corrosion protection can help reduce wear and deliver longer component life
  • Increased load-carrying capability can help reduce operating costs
  • Good resistance to foaming, which helps maintain film strength for effective lubrication
  • Wide multipurpose capability can reduce number of gear lubricants to simplify inventory and minimize misapplication

Specifications, approvals and technical details

Specifications and approvals  

Mobilube HD Plus 80W-90 Gear Oil is recommended by ExxonMobil for use in:

  • Heavy-duty manual transmissions, axles, and final drives requiring API GL-5 and MT-1 level performance
  • On-highway light and heavy-duty trucks, buses, vans and cars
  • Off-highway industries, including construction, mining, quarrying and agriculture
  • Other heavy-duty industrial and automotive applications involving hypoid and other gears operating under conditions where high-speed/shock load, high-speed/low-torque, and/or low-speed/high-torque conditions prevail
  • Initial fill, top-off and refill of enclosed commercial gearing in manual or semiautomatic transmissions where gear lubricants are recommended, including drive axles and final drives

Mobilube HD Plus 80W-90 Gear Oil has the following builder approvals:

  • Mack GO-J

Mobilube HD Plus 80W-90 Gear Oil is of the following quality level, but not approved:

  • MIL-PRF-2105E

Technical details  

SAE Grade 80W-90
Viscosity, ASTM D 445

cSt @ 100ºC 14.5
cSt @ 40ºC 139
Viscosity Index, ASTM D 2270 103
Pour Point, ºC, ASTM D 97 -27
Flash Point, ºC, ASTM D 92 210
Density @ 15ºC kg/l, ASTM D 4052 0.895
View product data sheet for

Mobilube™ HD Plus 80W-90 Gear Oil

Specifications and approvals  

Mobilube HD Plus 85W-140 Gear Oil is recommended by ExxonMobil for use in:

  • Heavy-duty manual transmissions, axles, and final drives requiring API GL-5 and MT-1 level performance
  • On-highway light and heavy-duty trucks, buses, vans and cars
  • Off-highway industries, including construction, mining, quarrying and agriculture
  • Other heavy-duty industrial and automotive applications involving hypoid and other gears operating under conditions where high-speed/shock load, high-speed/low-torque, and/or low-speed/high-torque conditions prevail
  • Initial fill, top-off and refill of enclosed commercial gearing in manual or semiautomatic transmissions where gear lubricants are recommended, including drive axles and final drives

Mobilube HD Plus 85W-140 Gear Oil has the following builder approvals:

  • Mack GO-J

Mobilube HD Plus 85W-140 Gear Oil is of the following quality level, but not approved:

  • MIL-PRF-2105E

Technical details  

SAE Grade 85W-140
Viscosity, ASTM D 445

cSt @ 40ºC 333
cSt @ 100ºC 25.4
Viscosity Index, ASTM D 2270 99
Flash Point, ºC, ASTM D 92 -18
Pour Point, ºC, ASTM D 97 230
Density @ 15ºC kg/l, ASTM D 4052 0.903
View product data sheet for

Mobilube™ HD Plus 85W-140 Gear Oil

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