Mobilgrease 33 (Case - 10 Tubes)

SKU# XOM110374

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Quick Overview

This product has a lead time of 10-14 business days.

Mobilgrease 33 is a general purpose high-performance synthetic aviation grease. This lithium complex grease has an NLGI grade between 1 and 2, and has a base oil and superior additives that provide better performance in a variety of temperatures and operating conditions.

Product Data Sheet

Mobilgrease 33

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  • Mobilgrease 33
  • Mobilgrease 33

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:

FeaturesAdvantages and Potential Benefits
High viscosity index polyalphaolefin basestockVery wide operating temperature range - outstanding high and low temperature performance.
Excellent lubricant film protection at high temperatures
Good storage stabilityGrease structure integrity maintained - low oil separation
Exceptional resistance to thermal and oxidative degradationLong grease and lubricated part service life
Resistance to degradation by water (hydrolysis)No risk of corrosion induced by acidic base oil degradation products
Low volatilityLittle vulnerability to significant base oil loss by evaporation in service
Excellent protection against wear, corrosion, and rustingExcellent bearing and component protection
Extreme-pressure characteristicsPrevention of excessive wear, even under shock load
High resistance to water washoutExcellent 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 3-33B (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.



Mobilgrease 33Is Approved AgainstMeets
Airbus AIMS09-06-002               X 
Boeing BMS 3-33B Type 1               X 
MIL-PRF-23827C, Amendment 2, Type I               X 
NATO G-354               X 
SAE AMS3052       X

Typical Properties

 Test MethodsBoeing BMS 3-33B RequirementsMIL-PRF-23827 Type I RequirementsAirbus AIMS09-06-002/ SAE AMS3052 RequirementsMobilgrease 33 (1)
NLGI Grade    1 1/2
Thickener Type Lithium ComplexMetallic SoapLithium ComplexLithium Complex
ColorVisualGreen to Blue Blue GreenBlue Green
Structure/ConsistencyVisualSmooth, free from visible air bubblesSmooth, free from lumps and visual impuritiesSmooth, free from lumps and visual impuritiesPass
OdorOlfactoryNo rancid, perfume, or alcohol odorNo rancid, perfume, or alcohol odor Pass
Viscosity of Base Oil, cStASTM D 445    
at 40 ºC    12.5
at 100 ºC    3.2
Dropping Point, ºC (ºF)ASTM D 2265205 (401) min165 (329) min200 (392) min255 (491)
Low Temp. Torque at -73ºC (-100ºF), NmDEF STAN 05-50 Part 62, ASTM D 1478    
Starting 0.75 max1.00 max0.75 max0.52
Running, after 1 Hr 0.10 max0.10 max0.10 max0.06
Low Temp. Torque with 10% water at -73ºC (-100ºF), NmDEF STAN 05-50 Part 62, ASTM D 1478    
Starting   1.00 max0.67
Running, after 1 Hr   0.20 max0.09
Penetration at 25ºC (77ºF), mm/10DEF STAN 05-50 Part 63, ASTM D 217    
Unworked  200 min 285
60 Strokes Worked 265-315270-310265-315292
100,000 Strokes WorkedFTM 313265-385270-375Report330
Penetration, 100,000 Strokes Worked with 10% water, mm/10DEF STAN 05-50 Part 63, ASTM D 217  Report330
Oil Separation, 30 Hrs at 100ºC, wt %ASTM D 61848 max5 max6 max4
Evaporation Loss, 22 Hrs at 100ºC, wt %ASTM D 2595 2 max 1
Evaporation Loss, 500 Hrs at 121ºC, wt %ASTM D 259510 max 10 max8.7
Copper Strip Corrosion, 24 Hrs at 100ºCASTM D 40481b max1b max1b max1b
AMS4640 Al/Ni Bronze Corrosion, 24 Hrs at 100ºCASTM D 4048No appearance change No appearance changePass
Four Ball Wear, scar dia., 1200rpm/40kg/1hr/75ºC, mmASTM D 22660.9 max 0.90 max0.4
Load Wear Index, kgfASTM D 259660 min30 min60 min110
Weld Load, kgfASTM D 2596  280 min700
Timken OK Load, lbfASTM D 250950 min  55
Rust Protection, 48 Hrs at 125ºF, ›1mm dia SpotsASTM D 1743 0 in 2 out of 3 bearings 0,0,0
SKF EMCOR Rust, 3% NaCl, ratingASTM D 61380, 0 0, 00,0
Water Washout, 1 Hr at 38ºC (100 ºF), wt %ASTM D 1264 20 max 3
Water Washout, 1 Hr at 79ºC (174 ºF), wt %ASTM D 12647.5 max 10 max6
High Temperature Performance, Hrs at 121ºCASTM D 33361,000 min1,000 min1,000 min2,200+
Oxidation Stability, pressure drop in kPaASTM D 942    
100 Hrs at 99ºC 70 max70 max50 max11
500 Hrs at 99ºC 105 max105 max105 max25
Fretting Wear, mg lossASTM D 41700.9 max Report0.6
Dynamic Bearing Life, No of cyclesBMS 3-33-8.230,000 min  Pass
Navy Gear Wear Test, mg loss/1000 cyclesFTM 335    
2.3 kg load  2.5 max 1.1
4.5 kg load  3.5 max 1.6
Dirt Count, Particles/mLFTM 3005    
25-74 Micron Size 1000 max1000 max 0
75 Micron or Larger 00 0
Storage Stability, 6 months at 40ºC, Penetration, mm/10FTM 3467    
UnworkedASTM D 217200 min200 min 289
60x workedASTM D 217   288
60x worked, Difference from UnworkedASTM D 217±30  -1
Difference from OriginalASTM D 217 ±30±302
Elastomer Compatibility, 168 Hrs at 70ºC, % vol changeFTM 3603    
Nitrile (NBR-L, AMS3217/2) -2.0 to +25.0 -2.0 to +25.0+12.6
Thermoplastic Compatibility, 70 Hrs at 100ºC, % vol changeASTM D 4289    
Hytrel 6356 + 0.5% carbon black ± 5.0  3.4
Delrin 100 AF (ASTM D 4181) ± 2.0  +0.1
PTFE (Teflon) (AMS 3652) ± 2.0  +0.1
Nylatron GS ± 1.0  -0.5
(1) Values may vary within modest ranges