Today’s technology has vastly improved the performance capabilities of heavy-duty on and off-highway equipment load, torque, speed, and control through innovative drivetrain designs. These designs have changed and increased the requirements of lubricants to deliver this higher level of performance, increase productivity, and reduce operating costs. For heavy-duty final drives, friction control, wear protection, thermal stability, shear stability, rust and corrosion prevention, and seal protection are features that must be optimally balanced to provide extended gear and seal life, smooth operation, improved fuel economy and high load high torque capability over a wide range of applications. The key benefits of Mobil Delvac 1 Gear Oil 80W-140 include:

Features Advantages and Potential Benefits
Exceptional thermal stability and resistance to high temperature oxidation Extended gear and bearing life due to minimal deposits
  Longer seal life
Outstanding protection against low speed/high torque wear and high speed scoring Increased load-carrying capability
  Reduced maintenance costs and longer equipment life
Exceptional shear stability Retains viscosity and film strength under severe operating conditions to prevent wear
Excellent rust, staining, and corrosion protection of copper and its alloys Reduced wear and longer component life
Enhanced friction reduction properties Improved fuel economy and reduced operating costs
Outstanding low temperature fluidity versus mineral oils Reduced wear and ease of start-up
Good resistance to foaming Maintains film strength for reliable lubrication
Compatible with typical automotive seals and gaskets Minimum leakage and reduced contamination


Recommended by ExxonMobil for use in:

  • Heavy-duty manual transmissions, axles and final drives requiring API GL-5 and MT-1 performance
  • On-highway light and heavy-duty trucks, busses and vans
  • Off-highway industries including: construction, mining, quarrying, and agriculture
  • Other heavy-duty industrial gear drives including hypoid and worm gears operating under conditions where high speed/shock load, high speed/low torque, and/or low speed/high torque conditions prevail
  • Differentials, final drives, transfer cases and other gear applications where lubricants meeting MIL-PRF-2105E, API Service GL-5 , EP gear lubricants are recommended
  • Equipment such as winch reduction gears and crawler vehicle propulsion gear drives that are exposed to severe low temperatures
  • Applications where extended service intervals and warranties are required
  • Not recommended for applications requiring API GL-4 Level performance
  • Not intended for automatic, manual or semiautomatic transmissions for which engine oil or automatic transmission fluids are recommended


Mobil Delvac 1 Gear Oil meets or exceeds the requirements of the following industry and builder specifications: 80W-140
Scania STO 1:0 X


Mobil Delvac 1 Gear Oil has the following builder approvals: 80W-140
Mack GO-J X
ZF TE-ML 05B, 12M, 16F, 21B X
Navistar MPAPS B-6821 X
SAE J2360 X


Mobil Delvac 1 Gear Oil is recommended by ExxonMobil for use in applications requiring: 80W-140

Typical Properties

Mobil Delvac 1 Gear Oil 80W-140
SAE Grade 80W-140
Viscosity, ASTM D 445  
cSt @ 40ºC 310
cSt @ 100ºC 31.2
Viscosity Index, ASTM D 2270 139
Pour Point, ºC, ASTM D 97 -36
Flash Point, ºC, ASTM D 92 210
Density @ 15ºC kg/l, ASTM D 4052 0.870


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July 9, 2019
9 months ago


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The Lubricant Store Store
its the best product and price!
MICHAEL L on Jun 27, 2018
its the best product and price!
MICHAEL L on Jun 27, 2018