AeroShell Grease 33 Synthetic Airframe Grease
AeroShell Grease 33 is a synthetic universal airframe grease developed for routine aircraft lubrication across a broad range of operating conditions. It is formulated with a synthetic hydrocarbon and ester base oil, a lithium complex thickener, corrosion and oxidation inhibitors, and load-carrying additives.
Its useful operating temperature range is -73°C to +121°C (-99°F to +250°F), supporting lubrication in both low-temperature and elevated-temperature aircraft environments. AeroShell Grease 33 was developed to cover a wider range of grease applications, helping operators reduce the number of separate greases held in inventory and lower the risk of selecting the wrong product.
AeroShell Grease 33 is approved to BMS 3-33C, MIL-PRF-23827C Type I, AIMS 09-06-002, COMAC QPL-CMS-OL-302, SAE AMS 3052, and NATO Code G-354.
Key Features
- Synthetic universal airframe grease
- Synthetic hydrocarbon and ester base oil
- Lithium complex thickener
- Useful operating temperature range of -73°C to +121°C (-99°F to +250°F)
- Contains corrosion and oxidation inhibitors
- Includes load-carrying additives
- Provides resistance to water washout
- Supports routine lubrication across a broad range of airframe applications
- May help reduce the number of different aircraft greases held in inventory
- May reduce the likelihood of grease misapplication when used within approved maintenance procedures
Recommended Applications
AeroShell Grease 33 may be used for routine lubrication on Boeing aircraft where MIL-PRF-23827C or BMS 3-24 is specified. It may also be used in certain Boeing applications that reference MIL-G-21164, subject to the latest Boeing service information and maintenance documentation.
Routine lubrication in applications requiring MIL-PRF-23827C is also permitted by the following aircraft manufacturers:
- Airbus
- BAe Regional Aircraft
- Canadair
- Embraer
- Fokker
- Gulfstream
- Lockheed
- McDonnell Douglas
Application Restrictions
AeroShell Grease 33 is not identified for:
- Aircraft wheel bearings
- Applications operating above 121°C
- Sliding applications that require molybdenum disulphide
- Components containing incompatible seal materials
Specifications, Approvals, and Recommendations
The current AeroShell Grease 33 technical data sheet lists:
- BMS 3-33C
- MIL-PRF-23827C (Type I)
- AIMS 09-06-002
- COMAC QPL-CMS-OL-302
- SAE AMS 3052
- NATO Code G-354
Typical Technical Characteristics
The following values are typical of current production and should not be treated as product specifications.
| Property |
Test Method |
Typical Value |
| Oil type |
Not specified |
Synthetic hydrocarbon / ester |
| Color |
Not specified |
Green |
| Thickener type |
Not specified |
Lithium complex |
| Base oil viscosity at -40°C |
ASTM D445 |
1,840 mm²/s |
| Base oil viscosity at 40°C |
ASTM D445 |
14.2 mm²/s |
| Base oil viscosity at 100°C |
ASTM D445 |
3.4 mm²/s |
| Useful operating temperature range |
Not specified |
-73°C to +121°C |
| Dropping point |
ASTM D566 |
227°C |
| Worked penetration at 25°C |
ASTM D217 |
297 |
| Bomb oxidation pressure drop at 99°C after 100 hours |
ASTM D942 |
3.5 kPa (0.5 psi) |
| Bomb oxidation pressure drop at 99°C after 500 hours |
ASTM D942 |
34 kPa (5 psi) |
| Oil separation after 30 hours at 100°C |
ASTM D6184 |
2% mass |
| Water washout at 79°C |
ASTM D1264 |
Less than 6% mass |
| Evaporation loss after 500 hours at 121°C |
ASTM D2595 |
Less than 10% mass |
| Anti-friction bearing performance at 121°C |
ASTM D3336 |
Greater than 1,200 hours |
| Load-carrying capability, LWI at 27°C |
ASTM D2596 |
Greater than 60 kg |
| Copper corrosion after 24 hours at 100°C |
ASTM D4048 |
Passes |
Frequently Asked Questions
What is AeroShell Grease 33 used for?
AeroShell Grease 33 is used for routine lubrication across a broad range of aircraft airframe applications where BMS 3-33C, MIL-PRF-23827C Type I, BMS 3-24, or another applicable requirement permits its use. The exact grease must be confirmed in the aircraft or component maintenance documentation.
What type of grease is AeroShell Grease 33?
AeroShell Grease 33 is a synthetic universal airframe grease formulated with a synthetic hydrocarbon and ester base oil and a lithium complex thickener. It also contains corrosion inhibitors, oxidation inhibitors, and load-carrying additives.
What is the AeroShell Grease 33 temperature range?
The useful operating temperature range of AeroShell Grease 33 is -73°C to +121°C, or approximately -99°F to +250°F.
Can AeroShell Grease 33 be used on aircraft wheel bearings?
No. Aircraft wheel bearings are specifically excluded from AeroShell Grease 33’s applications.
Can AeroShell Grease 33 be used in sliding applications?
AeroShell Grease 33 should not be used where the sliding application requires molybdenum disulphide. AeroShell Grease 64, formerly AeroShell Grease 33MS, is a separate molybdenum disulphide-containing grease intended for specific heavily loaded sliding applications.
What makes AeroShell Grease 33 different from other AeroShell greases?
AeroShell Grease 33 is designed as a synthetic universal airframe grease that can cover a broad range of routine lubrication requirements. Its lithium complex formulation and wide low-temperature operating range distinguish it from AeroShell greases intended primarily for wheel bearings, higher-temperature service, instruments, or heavily loaded sliding applications.
Is AeroShell Grease 33 compatible with all aircraft seals?
No. AeroShell Grease 33 contains synthetic oil and must not be used with incompatible seal materials.
What AeroShell Grease 33 package sizes does Petroleum Service Company offer?
Petroleum Service Company offers AeroShell Grease 33 in several package configurations for different aircraft maintenance and fleet requirements:
- 30-tube case (SKU: 550072764)
- Case of four 6.6 lb cans (SKU: 550043635)
- 35 lb pail (SKU: 550043623)
Product Videos
