Mobil AGL™ is a synthetic aviation gear lubricant designed to help civilian and military operators ensure the reliability of their helicopters’ transmissions, despite operating under extremely challenging conditions.

Formulated from base fluids with inherently high viscosity indexes and a unique, proprietary additive system, Mobil AGL offers measurably better wear protection than Type I (MIL-L-7808) and Type II (MIL-L-23699) turbine oils, as well as wear resistance that is especially beneficial to military and other helicopters operating under unusual stresses.

Reasons to trust Mobil AGL:

  1. Extend equipment life
  2. Minimize unexpected downtime
  3. Lengthen time between overhaul (TBO)
  4. Reduce operating costs
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Product information

   Mobil AGL™ Gear Lubricant performance profile 1.974 MB/pdf
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  • Severe operating conditions
  • Extended temperature range
  • High/Low temperature viscosity
  • Friction control
  • Load carrying capabilities
  • Rust protection
  • Corrosion protection
  • Wear protection
  • Foaming resistance

Resources

Aviation lubricant shelf life

Find out the recommended shelf life of ExxonMobil aviation lubricants.

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Features and benefits

Mobil AGL offers measurably better performance in lubrication of a helicopter transmission than Type I (MIL-L-7808) and Type II (MIL-L-23699) turbine oils at high and low temperatures as well as wear resistance that is especially beneficial to military and other helicopters operating under unusual stresses. 

Mobil AGL is formulated with synthesized hydrocarbon-based fluids. The combination of a naturally high viscosity index and a unique proprietary additive system helps enable Mobil AGL to provide outstanding performance in extreme service applications at high and low temperatures, well beyond the capabilities of mineral oils. 

These scientifically engineered synthetic oils are specifically formulated to provide outstanding equipment protection, helping to extend oil life and enable problem-free operation. Our work with equipment builders has helped confirm the results from our own laboratory tests showing the exceptional performance of Mobil AGL. Not least among the benefits, shown in work with OEMs, is the potential for significant reliability improvements in changing from mineral oil. These benefits are particularly evident in equipment which, by design, cannot avoid low overall efficiency, such as high ratio worm gears. Mobil AGL oils offer the following features and potential benefits:
Features
Benefits
Superb high temperature thermal/oxidation resistance
Helps extend equipment high temperature operating capability

Long oil life, helps reduce need and costs for oil change outs

Helps minimize sludge and deposits for trouble-free operation and long filter life
High viscosity index and absence of wax Maintains viscosity and film thickness at high temperatures

Exceptional low temperature performance, including start-up
Low traction coefficient
Reduces overall friction and can increase efficiency in sliding mechanisms such as gearing, with potential for reduced power consumption and lower steady-state operating temperatures.

Helps minimize effects of micro slip in rolling contact bearings for longer rolling-element life potential
High load carrying capability
Helps protect equipment and extend life; helps minimize unexpected downtime and extend service periods
Balanced additive combination

Provides excellent performance in terms of rust and corrosion prevention, water separability, foam control, air release performance ensuring problem-free operation in a wide range of industrial applications and reduced operating costs

Applications

While Mobil AGL is compatible with mineral oil based products, admixture may detract from it's performance. Consequently it is recommended that before changing a system to Mobil AGL, it should be thoroughly cleaned out and flushed to achieve the maximum performance benefits. Mobil AGL is compatible with the following seal materials: fluorocarbon, polyacrylate, polyurethane ether, some silicone, ethylene/acrylic, chlorinated polyethylene, polysulfide, and some nitrile rubbers. There is the potential for substantial variations in the elastomers being used today. For best results, consult your equipment supplier, seal manufacturer, or your local ExxonMobil representative to verify compatibility. Mobil AGL is compatible with mineral oils but co-mingling with other types oils may lead to fluid incompatibility or detract from the total performance capability.

Specifications and approvals

Mobil AGL is recommended by many helicopter OEM's for use in transmissions. Please consult with your equipment OEM or your ExxonMobil representative to determine if Mobil AGL can be used in your application.

Typical properties

Mobil AGL
ISO Viscosity grade 68



Viscosity, ASTM D 445


cSt @ 40ºC 66.0



cSt @ 100ºC 10.3

10.0 min
Viscosity index, ASTM D 2270 144


Pour point, ºC, ASTM D 97 -48


Flash point, ºC, ASTM D 92 231




Specific gravity, ASTM D 4052, 15ºC/15ºC 0.86



Appearance, visual

Orange



TOST, ASTM D 943, Hours to 2 NN


10,000+




RBOT, ASTM D 2272, min



1750





Rust protection, ASTM D665, Sea Water



Pass






Water separability, ASTM D 1401,Min. to 37 ml water @ 54ºC 20







Water seperability, ASTM D 1401,Min. to 37 ml water @ 82ºC -







Copper corrosion, ASTM D130, 24 hrs @ 121ºC 1B

Foam test, ASTM D 892, Seq I,II,IIITendency / Stability, ml/ml 0/0, 0/0, 0/0









FZG Scuffing test, DIN 51534 (mod), A/16.6/90, Failure Stage 11












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