Mobil Jet™ Oil 387

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Diagram of oil flow on gears

ExxonMobil and Japan Airlines: A legacy of passion and partnership

Reasons to trust Mobil Jet Oil 387

  1. Designed to deliver optimal engine performance and help operators avoid unscheduled/premature engine maintenance
  2. Offers exceptional elastomer compatibility, helping minimize oil leaks that can cause delays, cancellations and costly repairs
  3. Provides optimal wear protection, oxidative and thermal stability, and excellent deposit control, helping operators reduce unscheduled maintenance and maximize revenue-generating hours
  4. Offers excellent low-temperature fluidity in extreme temperatures as low as -40 degrees Fahrenheit 

Mobil Jet™ Oil 387 underwent 10+ years of extensive research and development and is one of the most tested oils on the market. It was subjected to rigorous testing on the ground and in flight, and was designed with custom-made molecules to deliver outstanding performance in HTS/HPC oils.

Proactively developed to respond to the evolving needs of our customers and the industry, Mobil Jet Oil 387 is our most advanced turbine oil ever developed. Specifically formulated to deliver unsurpassed engine performance, it strikes the perfect balance, providing optimal engine performance and advanced protection for engines and components. Featuring exceptional elastomer compatibility, excellent thermal and oxidative stability and advanced deposit control, Mobil Jet Oil 387 delivers a balance that has never before been achieved with a turbine oil, raising the bar in jet engine lubrication.

Mobil Jet Oil 387 is approved for use in an array of engine models and components.

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Product information

   Mobil Jet Oil 387 Performance Profile 3.086 MB/pdf
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   Austrian Airlines success story 1.479 MB/pdf
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Japan Airlines’ new Airbus A350 aircraft take to the skies with Mobil Jet™ Oil

Japan Airlines will use Mobil Jet™ Oil 387 turbine engine oil in its new Airbus A350 aircraft scheduled to take flight in September 2019.

English, Aviation news

Mobil Jet™ Oil 387 Used in First Boeing 787-10 Dreamliner

Following delivery to Singapore Airlines, the first Boeing 787-10 Dreamliner was converted to Mobil Jet Oil 387 turbine oil.

English, Aviation news

Mobil Jet™ Oil 387 approved for use in GE Aviation CF6 engines

GE Aviation approved the turbine oil for use in its CF6 engines, including CF6-6, CF6-50, CF6-80E and CF6-80C2 commercial and L1F and K1F military variants.

English, Aviation news

Mobil Jet™ Oil 387 lubricant now approved for Pratt & Whitney PurePower® Geared Turbofan™ PW1900G engines

With excellent load-carrying capabilities and the ability to withstand high temperatures, Mobil Jet Oil 387 lubricant is well suited for use in PW1900G engines.

English, Aviation news


Mobil Jet Oil 387 shows excellent performance controlling deposits typically experienced in both the liquid and vapor phases in bearing compartments, oil supply lines, and breather/scavenger lines. 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 viscosity of Mobil Jet Oil 387 at -40°C (-40°F), and a pour point below -54°C (-65°F), ensure the good low-temperature fluidity which permits starting and lubrication at temperatures as low as -40°C. In extensive laboratory testing, Mobil Jet Oil 387 exhibits excellent bulk oil stability at temperatures greater than 225°C (437°F).

Key features and benefits include: 

Advantages and potential benefits
Long-duration fluorocarbon compatibility Helps avoid premature or unscheduled engine repairs. Helps prevent leaks that can lead to air craft delays and cancellations.
Outstanding oil life characteristics, such as bulk oil stability, viscosity and TAN control Helps minimize formation of sludge and carbon deposits which allows better engine efficiency and reduced engine repair costs as well potentially achieving longer oil drain intervals (in certain applications such as marine and land based turbines), effective lubrication at high operating temperatures
Very low vapor/mist and thin film deposition resistance Helps control deposits in air vent tubes, bearingcompartments, and scavenge oil lines which will all result in reduced engine maintenance costs
Good low temperature fluidity Permits start-up and ensures effective lubrication of critical components (such as APUs in ETOPS applications) at temperatures as low as -40 °F


Mobil Jet Oil 387 is approved against the new SAE AS5780 High Performance Capability (HPC) standard. This civil specification was developed to meet the growing performance and quality needs that commercial airlines seek, especially with the entrance of new, higher-output and lower consumption engines.

OEM in-house evaluation/approval programs are also underway. Once complete, Mobil Jet Oil 387 will be commercialized for use in aircraft gas turbine engines, including turbo-jet, turbo-fan, turbo-prop, and turbo-shaft (helicopter), in commercial and military service. In addition, it will be suitable for aircraft-type gas turbine engines in industrial and marine applications.

Mobil Jet Oil 387 is compatible with other synthetic gas turbine lubricants meeting U.S. Military Specification MIL-PRF-23699. Mixing with other products, however, could result in some loss of its superior performance features. The lubricant 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. Engine/OEM Evaluations

Typical properties*

Mobil Jet Oil 387

cSt at 100°C (212°F) 5.2 4.9 to 5.4
cSt at 40°C (102°F) 25.9 23.0 min
cSt at -40°C (-40°F) 10140 13,000 max
0.1 % change at -40°C after 72 hr. 0.1 6%max
Flash Point, ° C ( ° F), min 278(532) 246 min.
Fire Point, ° C ( ° F) 292(558) No limit
Autogenous Ignition Temp, ° C ( ° F) 405(761) No limit
Pour Point, ° C( °F) -57 (-71) -54 max
Specific Gravity, 15/15°C (60/60°F) 0.999 No limit
TAN (mg KOH/g sample) 0.03 1.0 max
Evaporation Loss, %

6.5 hr at 204°C (400°F), 29.5" Hg 4 10 max
Foam, ml

Sequence 1, 24°C (75°F) 10 25 max
Sequence 2, 93.5°C (200°F) 10 25 max
Sequence 3, 75°C (after 200°F test) 10 25 max
Foam Stability, after 1 min settling, ml 0 0 max
Rubber Swell

F Rubber, 72 hr at 204°C (400°F), % 15 5 -25
H Rubber, 72 hr at 70°C (158°F), % 15 5 -25
Ryder Gear 2806 No limit
% Hercolube A 104 102 min.
*Typical properties are typical of those obtained with normal production tolerance and may vary slightly, while remaining within specified limits.
  • Aerolec VFG
  • Engine Alliance (EA) GP7200
  • GE Aviation 9X
  • GE Aviation CF34-10
  • GE Aviation CF34-10E
  • GE Aviation CF6-6
  • GE Aviation CF6-50
  • GE Aviation CF6-80
  • GE Aviation CF6-80C2
  • GE Aviation CF6-80E
  • GE Aviation GE90
  • GE Aviation GEnX-1B
  • GE Aviation GEnX-2B
  • Hamilton Sundstrand/UTAS APS 1000
  • Hamilton Sundstrand/UTAS APS 2000
  • Hamilton Sundstrand/UTAS APS 2100
  • Hamilton Sundstrand/UTAS APS 2300
  • Hamilton Sundstrand/UTAS APS 2600
  • Hamilton Sundstrand/UTAS APS 3200
  • Hamilton Sundstrand/UTAS APS 500
  • Hamilton Sundstrand/UTAS IDG
  • Hamilton Sundstrand/UTAS VFSG
  • Honeywell 131-9
  • Honeywell 131-9B
  • Honeywell 131-9C
  • Honeywell 331-500
  • Honeywell 331-600
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  • Honeywell 331-350
  • Honeywell GTCP 36-300
  • Honeywell GTCP 660
  • Honeywell GTCP-85
  • Honeywell HGT-1700
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  • Pratt & Whitney PW1100G-JM
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  • Pratt & Whitney PW1900G-JM
  • Pratt & Whitney PW4000
  • Rolls Royce - RB211-500
  • Rolls Royce BR715
  • Rolls Royce Trent 700
  • Rolls Royce Trent 7000
  • Rolls Royce Trent 800
  • Rolls Royce Trent 900
  • Rolls Royce Trent XWB
  • Safran VFG
  • Military use
  • Elastomer compatibility
  • Severe operating conditions
  • Deposit control
  • Extended temperature range
  • Wear protection
  • Maximize component life
  • Balanced formulation
  • High performance
  • SAE AS5780 HPC
  • MIL-PRF-23699-HTS
  • PRI-QPL-AS5780/HPC

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