MOBIL GREASE 28

MOBIL GREASE 28 is a high-performance grease designed to excel in a wide range of temperatures, combining a polyalphaolefin (PAO) synthetic base fluid with an organo-clay (non-soap) thickener. This grease offers exceptional performance across diverse temperature conditions. The synthetic base fluid, free from wax and with a high viscosity index compared to mineral oils, ensures excellent pump ability at low temperatures, minimal starting and running torque, and can contribute to lower operating temperatures in the load zone of rolling element bearings.

Product Type: Synthetic Grease

Application Area: Actuator, Bearings, Control Systems, Electric Motors, Helicoptor Rotor Bearings, Landing Wheel Assemblies, Naval Application, Naval Shipboard Auxiliary Machinery, Oscillating Bearings, Repackable Ball Bearings, Repackable Roll Bearings, Roller Bearings, Screw Jacks, Screws, Servo Devices, Splines, Wing Flap Screw Jacks, Worm Gear

Features: Anti-Wear Properties, Corrosion Resistant, Drag Reduction, Excellent Load Carrying Capabilities, Extreme Pressure Performance, High Dropping Point, High Performance, High Temperature Strength, High Thermo-Oxidative Stability, High Viscosity Index, Low Temperature Flexibility, Low Temperature Pumpability, Low Volatility, Low Wear, Oxidation Resistant, Thermal Resistance, Wash-Off Resistance, Wear Resistant

Thickener Type: Organo Clay

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Properties

NLGI Grade
Specifications
ValueUnitsTest Method / Conditions
GradeNLGI 1.5--
Base Oil Viscosity of Greases (at 100°C)5.7mm²/sAMS 1700
Base Oil Viscosity of Greases (at 40°C)29.3mm²/sAMS 1697
Copper Strip Corrosion Rating (at 100°C, 24 h)1B-ASTM D4048
Dirt Particles (75μ or larger)0-FTM 3005
Dropping Point307°C-
Evaporation Loss (at 177°C, 22 h)6mass %ASTM D2595
Four-Ball Wear Test (Scar Diameter)0.6mmASTM D2266
Load Carrying Capacity (Load-Wear Index)40kgfASTM D2596
Low Temperature Torque (Running at -54°C, 60 min)0.05NmASTM D1478
Low Temperature Torque (Starting at -54°C)0.43NmASTM D1478
NBR-L (at 70°C, AMS 3217/2 Compat, 158 h)6vol %FTM 3603
Oil Separation (at 100°C, 30 h )3.5mass %ASTM D6184
Penetration Worked (X 100,000, 1/16" holes, 0.1 mm)303-FTM 313
Penetration Worked (60 x 0.1 mm)293-ASTM D217
Water Washout Loss (at 41°C)1wt.%ASTM D1264(mod)