- Aviation greases
NLGI 1.5
Mobilgrease 33
General-purpose synthetic lithium complex aviation grease, −73 to +121 °C
Business customers only. We sell wholesale, invoiced to registered companies.
Approved by
Standards & approvals
MIL-PRF-23827C
MIL-PRF-23827C — aviation grease
The US military specification for a general-purpose aircraft grease; Type II covers a specific base-oil/thickener variant.
NATO Code G-354
NATO Code G-354 — aviation grease
NATO code for an aviation grease.
SAE AMS3052
Aircraft general-purpose, low-temperature-range grease
SAE Aerospace specification for lithium general-purpose airframe grease (bearings, gears, actuators) at low temperatures.
AIMS 09-06-002
Airbus AIMS 09-06-002 (general purpose airframe grease)
Airbus specification for general purpose, low-temperature airframe grease.
Specifications
- Brand
- Mobil (ExxonMobil)
- Range
- Mobilgrease
- Category
- Aviation greases
- Viscosity
- NLGI 1.5
- Manufacturer code
- 201550402040
- Availability
- On request
Typical characteristics
| Property | Typical value | Method |
|---|---|---|
| Al/Ni Bronze Corrosiveness, 24 h, 100 CRating | PASS | SAE AMS3058 3.2.7.b |
| Base oil viscosity of Greases @ 100 Cmm2/s | 3.2 | AMS 1700 |
| Base oil viscosity of Greases @ 40 Cmm2/s | 12.5 | AMS 1697 |
| Boeing Dynamic Bearing Life, cycles, BMS 3-33 | PASS | |
| Bomb Oxidation, Pressure Drop, 100 h, kPa | 11 | ASTM D942 |
| Colour | Blue Green | Visual |
| Copper strip corrosion, 24 h, 100 CRating | 1B | ASTM D4048 |
| Dirt, # particles 25u to 74 u | 0 | FTM 3005 |
| Dirt, # particles 75u or larger | 0 | FTM 3005 |
| Dropping point°C | 255 | ASTM D2265 |
| EMCOR Rust, 3% NaCl | 0,0 | IP 220 |
| Evaporation loss, 22 h, 100 C, mass% | 1 | ASTM D2595 |
| Evaporation loss, 500 h, 121 C, mass % | 8.7 | ASTM D2595 |
| Four-Ball Extreme pressure Test, Weld loadkgf | 700 | ASTM D2596 |
| Four-Ball Wear Test, Scar Diametermm | 0.4 | ASTM D2266 |
| Fretting Wearmg | 0.6 | ASTM D4170 |
| Gear Wear Test, 2.3 kg load, 1000 cycles, gear wt lossmg | 1.1 | FTM 335 (mod) |
| Gear Wear Test, 4.5 kg load, 1000 cycles, gear wt lossmg | 1.6 | FTM 335 (mod) |
| High Temperature Performance, Hrs at 121 Ch | 2,200+ | ASTM D3336 |
| Load carrying capacity, Load-Wear Indexkgf | 110 | ASTM D2596 |
| NBR-L, AMS 3217/2 Compat, 70C 158 h, vol % | 12.6 | FTM 3603 |
| Odour, OLFACTORY | PASS | |
| Oil separation, 30 h @ 100 C, mass% | 4 | ASTM D6184 |
| Oxidation stability, Pressure Drop, 500 h, kPa | 25 | ASTM D942 |
| Penetration, 60X, 0.1 mm | 292 | ASTM D217 |
| Penetration, Unworked, 0.1 mm | 285 | ASTM D217 |
| Rust Protection, 48 h @ 125 FRating | 0,0,0 | ASTM D1743 |
| Texture/Consistency | PASS | VISUAL |
| Timken OK load, lb | 55 | ASTM D2509 |
| Water Washout, Loss @ 38 Cwt% | 3 | ASTM D1264 |
| Water Washout, Loss @ 79 Cwt% | 6 | ASTM D1264 |
| Pen worked X 100, 000, 1/16" holes, 0.1 mm | 330 | FTM 313 |
| Low Temperature Torque, Starting @ -73 C, Nm | 0.52 | ASTM D1478 |
| Low Temperature Torque, Running @ -73 C, Nm | 0.06 | ASTM D1478 |
Complete documentation
Manufacturer's description
Mobilgrease 33 is a high-performance lithium-complex grease designed for general-purpose aircraft use, with a consistency between NLGI grades 1 and 2. It uses a 100% polyalphaolefin (PAO) base oil combined with premium additives, offering exceptional thermal/oxidative resistance, low volatility, resistance to hydrolysis, and excellent low-temperature mobility without the vulnerability of ester-based greases to water degradation. It is a true multipurpose aviation grease intended for highly loaded anti-friction bearings, gears and actuators, instruments and high-speed bearings (though not recommended for wheel bearings), and general airframe lubrication over -73°C to 121°C. The lithium-complex thickener system provides excellent structural stability and water washout resistance, while its additive system delivers superior rust, wear and load-carrying protection compared with greases that only meet the minimum MIL-PRF-23827 requirements. Mobilgrease 33 meets U.S. Military Specification MIL-PRF-23827, Type I, Boeing BMS 3-33C (Type 1) and Airbus AIMS09-06-002/SAE AMS3052, and is listed on the Qualified Products Lists of Airbus, Boeing and the U.S. Military. Its NATO Code Number is G-354.
Applications
- Mobilgrease 33 is a true multipurpose aviation grease for 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 an operating range of −100 °F to 250 °F (−73 °C to 121 °C).
- Can be used wherever the aircraft manufacturer specifies U.S. Military Specification MIL-PRF-23827 Type I, Boeing BMS 3-33C, or Airbus AIMS09-06-002/SAE AMS3052.
- Listed in the Qualified Products List of Airbus, Boeing and the U.S. Military for these specifications.
- NATO Code Number: G-354.
Performance & 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 only the minimum requirements of the MIL-PRF-23827 specification.
- Good storage stability: grease-structure integrity maintained, with 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.
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