ExxonMobil Mobilgrease 27

Subcategory: Fluid; Lubricant

Key Words: NLGI Grade 1.5

Material Notes:
Mobilgrease 27 is a high performance, aviation grease designed to combine the unique features of a synthetic ester base fluid with a lithium soap thickener. Its consistency is between an NLGI No. 1 and No. 2 grease. It offers outstanding performance over a wide temperature range. The thickener system provides excellent structural stability and resistance to water wash. The properties of the base oil, combined with selected additives, provide outstanding protection against rust, corrosion, wear and high temperature degradation. The synthetic base oil allows for low-temperature mobility/pumpability and very low starting and running torque values.

Mobilgrease 27 is a true multipurpose aviation grease intended for use in highly loaded gears and actuators as well as instruments, high speed bearings (though not recommended for wheel bearings), and general airframe lubrication over temperatures from –100ºF to 250ºF. Mobilgrease 27 is also an excellent choice for applications where a smooth, low noise, wide temperature range lubricating grease is required, such as in miniature precision bearings. Mobilgrease 27 contains a synthetic ester and should not be used in contact with incompatible seal materials. It may soften natural rubber, neoprene, certain electrical insulation materials and paints. Mobilgrease 27 meets the requirements and is approved against U.S. Military Specification MIL-PRF-23827, Grease, Aircraft and Instrument, Gear and Actuator Screw, Type I (Grease thickened with metallic soap). It is listed in the QPL-23827 Qualified Products List. In addition, Mobilgrease 27 may be used in all applications where MIL-G-3278, MIL-G-7118, MIL-G-7421, MIL-G-15793 and MIL-G-23827 are specified, subject to approval by the aircraft manufacturer. It is a NATO Code Number G-354 grease.