Mobilgrease™ 33

Inside component to an aircraft wing

Ester-free and offensive odor-free

With a 10-year shelf life – offering more than three times the life of similar-type competitive greases – Mobilgrease 33 grease helps our partners optimize their shelf-life management programs, enabling potential cost savings.

Mobilgrease 33 is a high-performance, BMS3-33C multipurpose airframe grease uniquely formulated with a proprietary blend of polyalphaolefin (PAO) base oils and lithium complex soap. Unlike other commercially available BMS3-33C greases, this unique formulation is ester-free, providing superior performance and hydrolytic stability, excellent resistance to thermal and oxidative degradation and exceptional wear protection in heavy loaded pressure environments without an offensive odor. Our ester-free blend offers exceptional performance in wet environments to resist water washout and evaporation loss, protecting the grease from the deteriorating effects of hydrolysis.

Why trust in Mobilgrease 33 aviation grease? Because it’s been specifically formulated to:

  • calendar 10 icon

    Help maximize inventory value with its 10-year shelf life

  • reduce costs blue icon

    Help consolidate inventories and reduce costs with its approved use for a wide range of applications

  • component life blue icon

    Help maximize component life with its uniquely patented formulation

  • structural stability blue icon

    Provide exceptional structural stability in extreme conditions and in adverse environments

  • exceptional performance icon

    Offer exceptional performance at high and low temperatures

  • offensive odor icon

    Have no offensive odor

Common grease point applications 

  • Outboard and inboard flaps
  • Outboard and inboard slats
  • Ground/flight spoilers
  • Elevators and stabilizers
  • Landing gear bushings
  • Rudders
  • Ailerons 

Product information

Data sheets

Technical Resources

All Mobilgrease 33 resources

Features and Benefits

The lithium complex thickener system provides excellent structural stability and resistance to water wash-out. Polyalphaolefin base oil is used in Mobilgrease 33 because of its exceptional thermal/oxidative resistance potential, low volatility, and superb low-temperature capability, without the potential vulnerability of an ester base oil to degradation from reaction with water. The synthetic polyalphaolefin base oil offers excellent low-temperature mobility/pumpability and very low starting and running torque values. In addition, the state-of-the art additive system in Mobilgrease 33 provides superior rust and wear protection and load-carrying capacity compared to aviation greases that meet the minimum requirements of the MIL-PRF-23827 specification.


Mobilgrease 33, with its unique features, provides the following advantages and potential benefits:



Advantages and Potential Benefits

High viscosity index polyalphaolefin basestock

Very wide operating temperature range - outstanding high and low temperature performance.

Excellent lubricant film protection at high temperatures

Good storage stability

Grease structure integrity maintained - low oil separation

Exceptional resistance to thermal and oxidative degradation

Long grease and lubricated part service life

Low volatility

Little vulnerability to significant base oil loss by evaporation in service

Resistance to degradation by water (hydrolysis)

No risk of corrosion induced by acidic base oil degradation products

Excellent protection against wear, corrosion, and rusting

Excellent bearing and component protection

Extreme-pressure characteristics

Prevention of excessive wear, even under shock load

High resistance to water washout

Excellent grease performance in adverse weather and other water-exposure conditions



Mobilgrease 33 is a true multipurpose aviation grease intended for use in highly loaded anti-friction bearings, gears, and actuators as well as instruments, high speed bearings (though not recommended for wheel bearings), and general airframe lubrication, over operating temperatures from –100ºF to 250ºF (–73ºC to 121ºC). It can be used in all applications for which the aircraft manufacturer specifies U.S. Military Specification MIL-PRF-23827, Type I (Grease, Aircraft and Instrument, Gear and Actuator Screw, Grease thickened with metallic soap), Boeing BMS 3-33C (Grease, Aircraft, General Purpose), and Airbus AIMS09-06-002/SAE AMS3052 (Grease, General Purpose, Airframe, Low Temperature Range, Lithium Thickened).  Mobilgrease 33 is listed in the Qualified Products List of Airbus, Boeing, and the U.S. Military for these specifications. The NATO Code Number for Mobilgrease 33 is G-354.


Specifications and Approvals

This product has the following approvals:

AIRBUS AIMS 09-06-002

BOEING BMS 3-33C Type 1


NATO G-354


This product meets or exceeds the requirements of:



Properties and Specifications




NLGI 1.5

Al/Ni Bronze Corrosiveness, 24 h, 100 C, Rating, SAE AMS3058 3.2.7.b


Base Oil Viscosity of Greases @ 100 C, mm2/s, AMS 1700


Base Oil Viscosity of Greases @ 40 C, mm2/s, AMS 1697


Boeing Dynamic Bearing Life, cycles, BMS 3-33


Bomb Oxidation, Pressure Drop, 100 h, kPa, ASTM D942


Color, Visual

Blue Green

Copper Strip Corrosion, 24 h, 100 C, Rating, ASTM D4048


Dirt, # particles 25u to 74 u, FTM 3005


Dirt, # particles 75u or larger, FTM 3005


Dropping Point, °C, ASTM D2265


EMCOR Rust, 3% NaCl, IP 220


Evaporation Loss, 22 h, 100 C, mass%, ASTM D2595


Evaporation Loss, 500 h, 121 C, mass %, ASTM D2595


Four-Ball Extreme Pressure Test, Weld Load, kgf, ASTM D2596


Four-Ball Wear Test, Scar Diameter, mm, ASTM D2266


Fretting Wear, mg, ASTM D4170


Gear Wear Test, 2.3 kg load, 1000 cycles, gear wt loss, mg, FTM 335 (mod)


Gear Wear Test, 4.5 kg load, 1000 cycles, gear wt loss, mg, FTM 335 (mod)


High Temperature Performance, Hrs at 121 C, h, ASTM D3336


Load Carrying Capacity, Load-Wear Index, kgf, ASTM D2596


NBR-L, AMS 3217/2 Compat, 70C 158 h, vol %, FTM 3603




Oil Separation, 30 h @ 100 C, mass%, ASTM D6184


Oxidation Stability, Pressure Drop, 500 h, kPa, ASTM D942


Penetration, 60X, 0.1 mm, ASTM D217


Penetration, Unworked, 0.1 mm, ASTM D217


Rust Protection, 48 h @ 125 F, Rating, ASTM D1743


Texture/Consistency, VISUAL


Timken OK Load, lb, ASTM D2509


Water Washout, Loss @ 38 C, wt%, ASTM D1264


Water Washout, Loss @ 79 C, wt%, ASTM D1264


Pen Worked X 100,000, 1/16" holes, 0.1 mm, FTM 313


Low Temperature Torque, Starting @ -73 C, Nm, ASTM D1478


Low Temperature Torque, Running @ -73 C, Nm, ASTM D1478



Health and safety

Health and Safety recommendations for this product can be found on the Material Safety Data Sheet (MSDS) @

  • Airbus
  • Boeing
  • Maximize component life
  • Resists degradation
  • Extended temperature range
  • High temperature stability
  • Structural stability
  • Water resistance
  • Volatility
  • Wear protection
  • Rust protection
  • Corrosion protection
  • Friction control
  • Load carrying capabilities
  • Multi-purpose airframe grease
  • Airbus AIMS09-06-002
  • Boeing BMS3-33C Type 1
  • MIL-PRF-23827C, Amendment 2, Type I
  • NATO G-354
  • SAE AMS3052
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