Product Description
Mobil Jet Oil II is a high performance aircraft-type gas turbine lubricant
formulated with a combination of a highly stable synthetic base fluid and a
unique chemical additive package. The combination provides outstanding
thermal and oxidative stability to resist deterioration and deposit formation
in both the liquid and vapour phases, as well as excellent resistance to
foaming. The effective operating range of Mobil Jet Oil II is between -40ºC
(-40 ºF) and 204 ºC (400ºF).
Mobil Jet Oil II is engineered for aircraft gas turbine engines used in
commercial and military service requiring MIL-PRF-23699 level performance. It
also is recommended for aircraft-type gas turbine engines in industrial or
marine service applications
Features and Benefits
Mobil Jet Oil II is formulated to meet the demanding requirements of
aircraft-type gas turbines operating over a wide range of severe operating
conditions. The product has a high specific heat in order to ensure good heat
transfer from oil-cooled engine parts. In extensive laboratory testing and
in-flight performance, Mobil Jet Oil II exhibits excellent bulk oil stability
at temperatures up to 204ºC (400 ºF). The evaporation rate at these
temperatures is low enough to prevent excessive loss of volume. Key features
and benefits include:
Features
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Advantages and Potential Benefits
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Excellent thermal and oxidation stability
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Reduces the formation of carbon and sludge deposits
Maintains engine
efficiency and extends engine life
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Excellent wear and corrosion protection
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Extends gear and bearing life Reduces engine maintenance
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Retains viscosity and film strength across wide temperature range
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Provides effective lubrication at high operating temperatures
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Chemically stable
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Reduces evaporation losses and lowers oil consumption
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Low pour point
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Eases start-up in low ambient temperature conditions
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Applications
Mobil Jet Oil II is recommended for aircraft gas turbine engines of the
turbo-jet, turbo-fan, turbo-prop, and turbo-shaft (helicopter) types in
commercial and military service. It is also recommended for aircraft-type gas
turbine engines used in industrial or marine applications.
Mobil Jet Oil II is approved against 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 performance
characteristics of Mobil Jet Oil II.
Mobil Jet Oil II is compatible with all metals used in gas turbine
construction, as well as with F Rubber (Viton A), H Rubber (Buna N), and
silicone seal materials.
Specifications and Approvals
Mobil Jet Oil II has the following builder approvals
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| Engines | |
| -Honeywell/Lycoming-Turbine engines | X |
| -Rolls-Royce/Allison Engine Company | X |
| -CFM International | X |
| -General Electric Company | X |
| -IAE International | X |
| -Pratt and Whitney Group | X |
| -SNECMA | X |
| -Pratt and Whitney, Canada | X |
| -Rolls-Royce Limited | X |
| -Honeywell/Garrett-Turbine Engine Company | X |
| -Turbomeca | X |
| Accessories | |
| -Honeywell-Auxiliary power units and air cycle machines | X |
| -Hamilton Standard-Starters | X |
| -Hamilton Sundstrand corp.- APUs, Constant-speed drives and integrated-drive generators | X |
Mobil JetOil II
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|
| Approved against Mil-PRF-23699 | X |
Typical Properties
Viscosity
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|
| cSt @ 40ºC (102ºF) | 27.6 |
| cSt @ 100ºC (212ºF) | 5.1 |
| cSt @ -40ºC (-40ºF) | 11,000 |
| % change @ -40ºC after 72 hours | 0.15 |
| Pour Point, ºC (ºF), ASTM D 97 | -59 (-74) |
| Flash Point, ºC (ºF), ASTM D 92 | 270 (518) |
| Fire Point, ºC (ºF) | 285 (545) |
| Autogenous Ignition Temp, ºC (ºF) | 404 (760) |
| TAN (mg KOH/g sample) | 0.03 |
| Density @15 ºC, kg/l, ASMT D 4052 | 1.0035 |
| Evaporation Loss, % | |
| 6.5 hr @ 204ºC, 29.5" Hg | 3.0 |
| 6.5 hr @ 232ºC, 29.5" Hg | 10.9 |
| 6.5 hr @ 232ºC, 5.5" Hg | 33.7 |
| (Equals pressure @ 40,000 Ft. altitude) | |
| Foam, ml | |
| Sequence I, 24ºC | 8 |
| Sequence II, 93.5ºC | 10 |
| Sequence III, 75ºC (after 200 F test) | 8 |
| Foam Stability, after 1 min settling, ml | 0 |
| Rubber Swell | |
| F Rubber, 72 hr @ 204º C, % | 15.6 |
| H Rubber, 72 hr @ 70ºC, % | 16.4 |
| Sonic Shear Stability, KV @ 40ºC, change, % | 0.9 |
| Ryder Gear, Ave. lb/in % Hercolube A | 2750 ,115 |
Health and Safety
Based on available toxicological information, this product is not expected to
produce adverse effects on health when used and handled properly. Information
on use and handling, as well as health and safety information, can be found in
the Material Safety Data Sheet (MSDS) which can be obtained from your local
distributor or via the Internet on http://www.exxonmobil.com/lubes.
The ExxonMobil logotype and Mobil are trademarks of Exxon Mobil Corporation, or one of its subsidiaries. PDSAV-03
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