Mobil Jet™ Oil 254
Mobil Jet™ Oil 254 has provided proven trusted performance for more than 30 years.
This third-generation, high thermal stability (HTS) oil was formulated to deliver exceptional high-temperature thermal stability and improved resistance to deterioration and deposit control versus Standard Type II oils. ExxonMobil Research and Engineering testing showed Mobil Jet Oil 254 lubricant offers excellent resistance to coking and deposit control, and provides exceptional oxidation and corrosion protection. Laboratory tests indicate Mobil Jet Oil 254 provides a 40 percent advantage in higher-temperature bulk oil stability vs. competitive HTS oils tested.
Overall, Mobil Jet Oil 254 delivers improved resistance to deterioration and deposit formation compared to standard Type II oils and can offer.
Reasons to trust Mobil Jet Oil 254
- Offers exceptional resistance to carbon coking and deposit formation, helping operators reduce shop visits and maintenance costs
- Helps operators reduce consumption costs due to its outstanding evaporative loss properties
- Offers outstanding engine protection, even under extremely high operating temperatures
- Provides excellent low-temperature fluidity in startups as low as -40 degrees Fahrenheit
Product information
Data sheets
Features and Benefits
Mobil Jet Oil 254 is formulated to meet the demanding requirements of latest technology aircraft-type gas turbines operating over a wide range of severe operating conditions. When compared to a typical Type II lubricant, Mobil Jet Oil 254 reduces bulk oil oxidation by up to 50 percent and shows deposit control capability 50 F higher. These properties have been confirmed in various laboratory tests including; the Corrosion-Oxidation Stability Test, Alcor Deposition Test, Vapor Phase Coker, Erdco High-Temperature Bearing Test, Ryder Gear and the Mobil Thin Film Oxidation Test.The closely controlled low-temperature viscosity of Mobil Jet Oil 254, along with its low pour point (below -54 ºC), ensure good low-temperature fluidity to permit starting and lubrication at temperatures as low as -40 ºC. In extensive laboratory testing and in-flight experience, Mobil Jet Oil 254 also exhibits excellent bulk oil stability at temperatures up to 232 ºC (450 ºF) for extended periods. The evaporation rate at these temperatures is low enough to prevent excessive loss of volume. The load-carrying ability of Mobil Jet Oil 254 comes from its synthetic base stock viscosity and, therefore, is not subject to loss from viscosity index additive shear. The lubricant has excellent resistance to foaming.Key features and benefits include:
Features |
Advantages and Potential Benefits |
Excellent thermal and oxidation stability |
Reduces the formation of carbon and sludge deposits Maintains engine efficiency and extends engine life Reduces bulk oil oxidation by 50% and increases deposit control by 50 ºF |
Excellent wear and corrosion protection |
Extends seal, gear and bearing life Reduces engine maintenance |
Viscosity and shear stability across wide temperature range |
Provides effective lubrication at high operating temperatures |
Chemically stable at high operating temperatures |
Reduces evaporation losses and lowers oil consumption |
Excellent resistance to foaming |
Maintains film strength under rigorous operating conditions |
Good low temperature fluidity |
Permits start-up and ensures effective lubrication of critical components at temperatures as low as -40 °F |
Applications
Mobil Jet Oil 254 is recommended for aircraft gas turbine engines of the turbo-jet, turbo-fan, turbo-prop, and turbo-shaft (helicopter) types used in commercial and military service. It is also suitable for aircraft-type gas turbine engines used in industrial or marine applications.Mobil Jet Oil 254 is approved against the High Thermal Stability (HTS) classification of U.S. Military Specification MIL-PRF-23699. It is also compatible with other synthetic gas turbine lubricants meeting MIL-PRF-23699. However, mixing with other products is not recommended because the blend would result in some loss of the superior performance characteristics of Mobil Jet Oil 254.Mobil Jet Oil 254 is completely compatible with all metals used in gas turbine construction, as well as with F Rubber (Viton A), H Rubber (Buna N), and other commonly used seal materials.
Mobil Jet Oil 254 has the following builder approvals *
Engines
• Honeywell/Lycoming-Turbines
• Rolls-Royce/Allison Engine Company
• CFM International
• General Electric Company
• International Aero Engines
• Pratt and Whitney Group
• Pratt and Whitney, Canada
• Rolls-Royce Limited
• SNECMA
• Honeywell/Garrett Turbine Engine Company
Accessories
• Honeywell-Auxiliary power units and air cycle machines
• Hamilton Standard-Starters
• Hamilton Sundstrand Corp.-APUs, constant-speed drives and integrated-drive generators
* Specific engine or equipment approval must be verified with the builder
Specifications and Approvals
This product has the following approvals: |
MIL-PRF-23699-HTS |
Properties and Specifications
Property |
|
Autogenous-ignition temperature test, deg.C, 30 CFR 35.20 |
399 |
Change in Kinematic Viscosity, 72 h @ -40 C, %, ASTM D2532 |
-2.2 |
Elastomer Compatibility, AMS-3217/4 (72hrs @204C), % swell, FTMS 791-3604 |
20.8 |
Elastomer Compatibility,AMS-3217/1(72hr @70C), % swell, FTMS 791-3604 |
20 |
Evaporation Loss, 6.5 h, 204 C, mass%, ASTM D972(mod) |
7.4 |
Evaporation Loss, 6.5 hr @ 232 C, 5.5" Hg, mass %, ASTM D972(mod) |
25.2 |
Fire Point, °C, ASTM D92 |
288 |
Flash Point, Cleveland Open Cup, °C, ASTM D92 |
254 |
Foam, Sequence I, Tendency, ml, ASTM D892 |
0 |
Foam, Sequence II, Tendency, ml, ASTM D892 |
10 |
Foam, Sequence III, Tendency, ml, ASTM D892 |
0 |
Kinematic Viscosity @ 100 C, mm2/s, ASTM D445 |
5.3 |
Kinematic Viscosity @ 40 C, mm2/s, ASTM D445 |
26.4 |
Kinematic Viscosity @ -40 C, mm2/s, ASTM D445 |
11500 |
Pour Point, °C, ASTM D5950 |
-62 |
Shear Stability, %KV loss, ASTM D2603 |
0.7 |
Specific Gravity 60 F / 60 F, ASTM D1429 |
1.0044 |
Total Acid Number, mgKOH/g, ARP 5088 |
0.08 |
Ryder Gear Load Carrying, % vs ref., FTMS 791-6508 |
114 |
Health and safety
Health and Safety recommendations for this product can be found on the Material Safety Data Sheet (MSDS) @ http://www.msds.exxonmobil.com/psims/psims.aspx
CFM 56-3B/3C
CFM 56-7B
CFM Leap 1A
CFM Leap 1B
CFM Leap 1C
Rolls Royce - RB211-500
Rolls Royce Trent 500
Rolls Royce Trent 700
Rolls Royce Trent 800
GE Aviation CF6-80E
GE Aviation CF6-50
GE Aviation CF34-3
GE Aviation CF34-8C
GE Aviation CF34-8E
International Aero Engines (IAE) V2500
Engine Alliance (EA) GP7200
GE Aviation CF34-10
GE Aviation CF34-10E
GE Aviation GE90
GE Aviation GEnX-1B
GE Aviation GEnX-2B
Pratt & Whitney JT8-D
Pratt & Whitney PW2000
Pratt & Whitney PW4000
Pratt & Whitney PW6000
Pratt & Whitney PW1500G
Pratt & Whitney Canada 901
Pratt & Whitney Canada 980
Honeywell GTCP 36-300
Honeywell GTCP-85
Honeywell 131-9B
Honeywell 131-9C
Honeywell 331-200
Honeywell 331-350
Honeywell 331-500
Honeywell HGT-750
Honeywell HGT-1700
Honeywell RE220
Hamilton Sundstrand/UTAS APS 500
Hamilton Sundstrand/UTAS APS 1000
Hamilton Sundstrand/UTAS APS 2000
Hamilton Sundstrand/UTAS APS 2300
Hamilton Sundstrand/UTAS APS 2600
Hamilton Sundstrand/UTAS APS 3200
Hamilton Sundstrand/UTAS VFG
Hamilton Sundstrand/UTAS VFSG
Hamilton Sundstrand/UTAS IDG
Hamilton Sundstrand/UTAS Starters
Aerolec VFG
CFM 56-2C
Rolls Royce BR715
GE Aviation CF6-6
Pratt & Whitney JT9-D
Pratt & Whitney PW1900G
Honeywell GTCP 660
Honeywell HW TSCP-700
- Military use
Severe operating conditions
Deposit control
Corrosion protection
High/Low temperature viscosity
Foaming resistance
Extended temperature range
Oxidation stability
Low temperature performance
- MIL-PRF-23699-HTS
- PRI-QPL-AS5780/HPC
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