The Mobilgear MS Series of products is an important member of the Mobil brand of lubricants and enjoy recognition among equipment operators for their superb performance capabilities in misting applications. Mobilgear MS Series oils were developed specifically for mist applications and have undergone an arduous protocol of testing, including misting performance, in their development.
Mobilgear MS Series offer the following features and potential benefits:

Features Advantages and Potential Benefits
Superior mist forming and reclassifying properties Ensures even distribution of lubricant on machine parts with control of stray mist for reliable lubrication and problem-free operation, reduced leakage and lower oil consumption
Excellent EP and anti-wear performance Prevents machine element wear with resulting savings in maintenance and parts replacement
High quality base oil and additive components Avoids reclassifier plugging problems which can result in catastrophic bearing and gear failure, with accompanying downtime and replacement costs
Excellent resistance to oxidation Long product life, reduced product and maintenance costs
Very good rust protection including sea water Excellent equipment protection


Mobilgear MS Series oils are designed for use in all oil mist lubrication systems. Such systems work by dispersing very small droplets of oil in smoothly flowing air, distributing the oil mist to the points of application and mechanically condensing the mist, causing the oil to impinge on and wet the surfaces to be lubricated. The higher viscosity Mobilgear MS grades may require thermal misting devices to form proper dispersions when ambient temperatures are moderate or low. Mobilgear MS is suitable for oil / air delivery systems such as airline oilers. Specific applications include:

  • Industrial gearing such as cooling tower gearboxes
  • Slow-speed, heavily-loaded bearings (higher viscosity grades)
  • High-speed bearings (lower viscosity grades)
  • Machine tools, ways and screws
  • Process pumps, electric motors and blowers
  • Steam turbines and electric motors

Typical Properties

Mobilgear MS Series 32 100 320 460
Viscosity, ASTM D 445
cSt @ 40º C 32 100 320 460
cSt @ 100º C 5.5 11.2 25.0 31.5
Viscosity Index, ASTM D 2270 110 95 100 100
Pour Point, ºC, ASTM D 97 -12 -12 -9 -6
Flash Point, ºC, ASTM D 92 210 234 230 238
Density @15.6º C, ASTM D 4052, kg/l 0.88 0.89 0.90 0.90
FZG Scuffing, DIN 51534, A/8.3/90, Fail Stage 12+ 12+ 12+ 12+
4-Ball EP test, ASTM D 2783, Weld Load, kg 160 250 250 250
Load Wear Index, kgf 25 48 48 48
4-Ball Wear Test, ASTM D 4172 mod, (20kg/54º C/1800rpm/1 hr), Scar, mm 0.5 0.3 0.3 0.3
Timken OK Load, ASTM D 2782, lb 50 65 65 65
Rust protection, ASTM D 665, Sea Water Pass Pass Pass Pass


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