Mobilube HD 80W-90 (GL-5) — Heavy-Duty Gear Lubricant
Mobilube HD 80W-90 (GL-5) — Heavy-Duty Gear Lubricant
Mobilube™ HD Series — Heavy-Duty Axle & Gear Lubricant
Mobilube™ HD 80W-90
Heavy-Duty GL-5 Gear Lubricant | SAE 80W-90 | Hypoid Axles & Final Drives
80W-90
SAE Grade
GL-5
API Rating
105
Viscosity Index
-30°C
Pour Point
Product Overview
Mobilube™ HD 80W-90 is a high-performance heavy-duty gear lubricant formulated from high-performance base oils and an advanced additive system — engineered for heavy-duty axles, final drives and manual transmissions where extreme pressures and shock loading are expected. Recommended for applications requiring API GL-5 service, it delivers excellent chemical and thermal stability at elevated operating temperatures, good low-temperature performance and outstanding rust and corrosion protection in wet and water-contaminated conditions.
The reliable, cost-effective mineral gear oil choice for South African fleet, mining, construction and agricultural operations. Approved by ZF (TE-ML 05A, 07A, 12E, 16F, 19B, 21A), Meritor, Dana Spicer and Mack. Meets MIL-PRF-2105E. Available in 20L and 208L drum from Orbit Industrial — Genuine Mobil Lubricants Distributor, South Africa.
80W-90 vs 85W-140 — When to Specify Each Grade
Always confirm grade from your OEM handbook — contact Orbit Industrial for application-specific grade selection assistance
Specify 80W-90 when:
· OEM specifies SAE 80W-90 grade
· General on-highway and off-highway API GL-5 applications
· Mixed temperature range operations
· Lighter vehicle axles and final drives
· Standard fleet and agricultural equipment maintenance
Specify 85W-140 when:
· OEM specifies SAE 85W-140 or 90 grade
· Heavy towing or drawbar applications
· Fully loaded haul trucks in high ambient temperatures
· High-torque low-speed applications requiring maximum film thickness
· Axles running consistently hot under sustained high load
Also available: Mobilube HD 85W-140 →
Performance Benefits
Excellent Chemical & Thermal Stability
Maintains oil integrity at elevated bulk oil temperatures encountered in heavily loaded axles and final drives — resisting oxidation, deposit formation and viscosity increase under sustained high-load and high-temperature operating conditions.
Outstanding EP Protection
Advanced EP additive system protects hypoid gear teeth under the three critical loading conditions — high-speed/shock load, high-speed/low-torque and low-speed/high-torque — that cause premature gear wear and failure in under-specified gear lubricants.
Good Low-Temperature Performance
Pour point of -30°C provides adequate cold-start performance for South African climate conditions — ensuring oil circulation to axle and drivetrain components on cold morning starts across the Western Cape, Northern Cape and high-altitude mining sites.
Outstanding Rust & Corrosion Protection
Demonstrated excellent rust protection in water-contaminated and wet operating conditions — protecting axle and final drive components from corrosive wear in wet haul road environments, high humidity coastal mining sites and agricultural operations.
Cost-Effective Mineral Performance
Delivers reliable API GL-5 performance at a mineral oil price point — the right specification for fleet operations, mining haul truck axles and agricultural equipment where operating conditions do not require the additional cost of fully synthetic gear oil.
Broad OEM Coverage
Meets API GL-5 — accepted across the widest range of heavy-duty truck, commercial vehicle and off-highway equipment OEM specifications requiring API GL-5 axle and final drive gear lubricant. One product covering a broad mixed fleet requirement.
Recommended Applications
Heavy-Duty Truck Axles
Hypoid rear axles on on-highway light and heavy-duty trucks, buses and commercial vehicles from all major OEM brands requiring API GL-5 gear lubricant specification.
Mining Haul Truck Axles
Final drives and axles on Cat, Komatsu, Bell and Liebherr haul trucks in open pit mining operations across the Northern Cape where API GL-5 mineral gear oil meets OEM requirements.
Construction Equipment
Axles and final drives on ADTs, graders, wheel loaders, excavators and compactors in construction and civil engineering applications across the Western Cape.
Agricultural Equipment
Tractor axles and final drives, combine harvester drives and other agricultural equipment across the Western Cape and Northern Cape farming regions where API GL-5 mineral gear oil is specified.
Industrial Hypoid Gears
Heavy-duty industrial and automotive applications involving hypoid gears under high-speed/shock load, high-speed/low-torque and low-speed/high-torque conditions.
Initial Fill, Top-Off & Refill
Suitable for initial fill, topping-off and refilling of enclosed commercial drive axles and final drives — across mixed fleet operations and mining site maintenance programmes.
Note: Mobilube HD 80W-90 is not recommended for applications requiring API GL-4 level performance, and is not intended for transmissions requiring engine oil or automatic transmission fluid.
Industry Specifications & OEM Approvals
API GL-5
Primary specification — covers all heavy-duty hypoid axle and final drive applications requiring GL-5 performance level
MIL-PRF-2105E
US Military specification — confirms performance at the highest GL-5 requirement level
ZF TE-ML 05A · 07A · 12E · 16F · 19B · 21A
Direct ZF approval — covers the full range of ZF axle and transmission applications
Mack GO-G Plus
Mack Trucks axle and drivetrain gear lubricant specification
Meritor 0-76-D · 0-76-N
Direct Meritor (ArvinMeritor) approval — widely fitted axles on South African heavy truck and bus fleets
Dana Spicer SHAES-256 Rev E
Direct Dana Spicer approval — Dana axles widely fitted on ADTs and construction equipment
Technical Properties
| Property | Test Method | Value |
|---|---|---|
| SAE Grade | — | 80W-90 |
| Kinematic Viscosity @ 100°C | ASTM D445 | 14.5 mm²/s |
| Kinematic Viscosity @ 40°C | ASTM D445 | 136 mm²/s |
| Viscosity Index | ASTM D2270 | 105 |
| Pour Point | ASTM D97 | -30°C |
| Flash Point (COC) | ASTM D92 | 202°C |
| Density @ 15°C | ASTM D4052 | 0.90 kg/l |
Typical properties — not guaranteed specifications. Source: ExxonMobil Product Data Sheet.
Pack Sizes & Procurement
In Stock — Western Cape & Northern Cape
20 Litre
Workshop supply & small fleet
208 Litre Drum
Fleet depots & mining site supply
Also available: Mobilube HD 85W-140 for high-load towing, haul truck and heavy agricultural applications requiring the heavier grade.
Technical Documentation
Mobilube™ HD 80W-90 — Technical Datasheet
ExxonMobil Product Data Sheet · Distributed by Orbit Industrial
For Safety Data Sheet (SDS) visit exxonmobil.com/en/sds/sdssearch → · Contact Orbit Industrial for application confirmation and technical support.
Orbit Industrial Supplies is a Genuine Mobil Lubricants Distributor supplying Mobil lubricants to mining, marine, fleet and industrial operations across South Africa. Full gear oil range → · Mining supply →

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