Greases Mobilgrease 28

Product Description
Mobilgrease 28 is a supreme performance, wide-temperature, antiwear grease designed to combine the unique
features of a polyalphaolefin (PAO) synthetic base fluid with an organo-clay (non-soap) thickener. Its consistency
is between an NLGI No. 1 and No. 2 grease. It offers outstanding performance over a wide temperature range.
The wax-free nature of the synthetic base fluid, together with its low coefficient of traction compared with mineral
oils, provide excellent low temperature pumpability, very low starting and running torque, and can reduce
operating temperatures in the load zone of rolling element bearings.The clay thickener gives Mobilgrease 28 a
high dropping point value of around 300?C, which provides excellent stability at high temperatures. Mobilgrease
28 resists water washing, provides superior load-carrying ability, reduces frictional drag, and prevents excessive
wear. Tests show that Mobilgrease 28 lubricates effectively rolling element bearings under conditions of high
speeds and temperatures. Mobilgrease 28 has also shown superior ability to lubricate heavily loaded sliding
mechanisms, such as wing flap screw jacks.For more than 30 years, Mobilgrease 28 has been the multi-purpose
grease of choice for military and related aviation applications, worldwide.
Features and Benefits
A particular requirement of aviation greases is the need to resist high temperature stresses, while providing
excellent starting and low torque at low-temperature. To meet this combination of needs ExxonMobil product
formulation scientists chose proprietary synthetic base oils for Mobilgrease 28 because of their low volatility,
exceptional thermal/oxidative resistance, and superb low-temperature capability. Formulators chose specific
thickener chemistry and a proprietary additive combination which would maximize the benefits of the synthetic
base oils.Mobilgrease 28 meets the requirements of key military and commercial aviation specifications and
has built up a superb reputation for performance and reliability among users around the world.Mobilgrease 28
provides the following advantages and potential benefits:
Features Advantages and Potential Benefits
Allows wide operating temperature range - outstanding
high and low temperature performanceProvides thicker
High viscosity index (VI) synthetic base stock with no
wax content
fluid films protecting against wear of equipment parts
operating at high temperatureCauses low resistance
during start-up at very low temperatures
Superb bearing protection and extended bearing life and
reduced bearing replacement costs
Excellent protection against wear and corrosion
Extreme-pressure protection characteristics Avoids excessive wear, even under shock load
High thermal/oxidative stability Long relubrication intervals
Maintains excellent grease performance in adverse
weather and other water-exposure conditions
High resistance to water washout
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