MOBIL28-CTG - Mobil Aviation Synthetic Aviation Grease 28 Single Tube

MOBIL28-CTG – Mobil Aviation Synthetic Aviation Grease 28 Single Tube

Available now on the Airparts.aero Marketplace.

Overview

Mobil Aviation Grease 28 is a flight-critical, supreme performance, wide-temperature, anti-wear grease, representing the industry benchmark for multipurpose aerospace applications. This is not a standard grease; it is an advanced, fully synthetic lubricant engineered by ExxonMobil, combining a polyalphaolefin (PAO) synthetic base fluid with a non-soap organo-clay (bentonite) thickener. The unique, wax-free properties of the PAO base oil combined with the high thermal stability of the clay thickener allow the Mobilgrease 28 to perform flawlessly across an exceptionally wide temperature range, from arctic cold to the high heat of jet aircraft wheel bearings.

This grease is qualified under the stringent MIL-PRF-81322G military specification. Its superior protection against wear, rust, and corrosion makes it the specified lubricant for a vast number of applications on commercial airliners, business jets, and military aircraft worldwide.

Key Features

• Exceptional Temperature Range: The key performance characteristic is its ability to operate in an extremely wide temperature range, from -65°F (-54°C) to +350°F (177°C). The synthetic PAO base oil ensures excellent low-temperature pumpability and prevents solidification, while the clay thickener will not melt or run at high temperatures.

  
  
  
  

  
  

• Superior Wear & High-Load Protection: Formulated with an advanced additive package to provide excellent protection against wear, friction, and scoring under heavy and shock-loaded conditions. It has a high load-carrying capacity, making it ideal for landing gear and flight control bearings.

  
  
  
  

  
  

• Excellent Water Resistance: The formula provides outstanding resistance to water washout and water spray-off. This is a critical property for components like landing gear bearings that are frequently exposed to rain, slush, and de-icing fluids.

  
  

  
  

• Clay (Non-Soap) Thickener: The organo-clay thickener has no dropping point, meaning it will not melt at high temperatures like conventional soap-based greases. This ensures the grease stays in place, providing continuous lubrication in the most demanding, high-temperature applications.

• Corrosion & Oxidation Stability: Provides a robust protective film that guards against rust and corrosion. The synthetic base oil offers excellent resistance to thermal and oxidative degradation, ensuring a long service life for both the grease and the components it protects.

  
  
  
  

  
  

Technical Specifications

• Product Name: Mobil Aviation Grease 28

• Military Specification: MIL-PRF-81322G

  
  

  
  

• NATO Code: G-395

• Thickener Type: Organo-Clay (Bentonite)

  
  

  
  

• Base Oil: Polyalphaolefin (PAO) Synthetic Hydrocarbon

  
  

  
  

• NLGI Grade: 1.5

  
  

  
  

• Operating Temperature Range: -65°F to 350°F (-54°C to 177°C)

• 4-Ball Wear Scar (ASTM D2266): 0.6 mm (Typical)

• Water Washout (ASTM D1264) @ 175°F: 3.0 wt% loss (Typical)

• Container: Standard 13.7 oz Grease Cartridge

  
  

  
  

Aircraft Compatibility

Mobilgrease 28 is a multipurpose airframe grease with broad specification and approval from nearly every major commercial and military aircraft manufacturer.

• Common Aircraft Platforms:

  • Boeing, Airbus, Bombardier, Embraer, Textron Aviation

• Common Applications:

  • Wheel Bearings: The primary application on many jet aircraft.

    
    

    
    

  • Flight Control Systems: Actuator screw jacks, gears, and spherical bearings.

    
    

    
    

  • Landing Gear: Trunnions, pivot points, and bogie pins.

  • Airframe: Cargo rollers, door hinges and latches, and slat/flap mechanisms.

Why Choose Mobilgrease 28?

The failure of a critical bearing in a flight control system or landing gear can be catastrophic. Mobilgrease 28 is the globally trusted, military-specification grease engineered to prevent such failures. Its unique synthetic formulation provides a level of performance across extreme temperature ranges that conventional mineral-oil greases cannot match. By using a certified, OEM-approved grease, you are ensuring that your aircraft's most critical moving parts are protected by the best possible lubrication technology, reducing wear and enhancing safety.

The Mobilgrease 28 formulation represents an ideal combination of advanced lubricant science. The polyalphaolefin (PAO) base fluid is a pure, synthesized hydrocarbon that is free of the wax molecules found in conventional mineral oils. This absence of wax is what gives it its exceptionally low pour point and excellent performance at arctic temperatures. The organo-clay thickener is a bentonite clay that has been chemically treated to make it oleophilic (oil-attracting). Unlike soap-based thickeners which are composed of long fibers that can shear and break down under stress, the clay thickener consists of microscopic platelets. These platelets form a lattice structure that holds the PAO base oil in suspension. This structure is thermally stable and does not have a melting or "dropping" point, ensuring the grease maintains its consistency and stays in place even when subjected to the extreme temperatures of a jet aircraft's brakes and wheels.

Note: This is a professional-grade aerospace lubricant. Always consult the specific aircraft's maintenance manual to ensure this is the correct, specified grease for the intended application. Do not mix with other grease types unless explicitly permitted by the manufacturer. Refer to the Material Safety Data Sheet (SDS) for complete safety and handling information.