DISCONTINUED - For a product data sheet or replacement product information, please see the contact information at the bottom of this document.

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.

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, specific synthetic base oils are used in Mobilgrease 27 because of their exeptional thermal/oxidative resistance potential, and superb low-temperature capability.

Mobilgrease 27 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 27 provides the following advantages and potential benefits:

Features	Advantages and Potential Benefits
High viscosity index base stock with no wax content	Very wide operating temperature range - outstanding high and low temperature performance Excellent film protection at high temperatures Minimum resistance to start-up at extremely low temperatures
Good storage stability	Low separation
Excellent protection against wear and corrosion	Provides excellent bearing protection
Extreme-pressure characteristics	Prevents excessive wear, even under shock load
High resistance to water washout	Maintains excellent grease performance in adverse weather and other water-exposure conditions

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.

Based on available toxicological information, this product is not expected to produce adverse effects on health when used and handled properly. Information on use and handling, as well as health and safety information, can be found in the Material Safety Data Sheet (MSDS) which can be obtained from your local distributor or via the Internet on http://www.exxonmobil.com/.

PDS AV-14