Mobil Jet Oil 254
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Brand: Mobil
Categoria: Olio lubrificante
Applicazione:
Turbine

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Aircraft-Type Gas Turbine Lubricant

Product Description

Mobil Jet Oil 254 is a third-generation, extra high performance, synthetic aircraft-type gas turbine lubricant engineered to meet the performance requirements for gas turbine engines used in commercial and military aircraft.  This product is formulated from a specially prepared, hindered-ester base stock and fortified with a unique chemical additive package. The result is a product having superior thermal and oxidation stability that resists deterioration and deposit formation while maintaining the physical characteristics required by builder and military specifications.  The physical properties of Mobil Jet Oil 254 are similar to those currently available, earlier-generation gas turbine lubricants. The effective operating range of  the lubricant is between -40°C (-40 °F) and 232°C (450°F).

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:

FeaturesAdvantages and Potential Benefits
Excellent thermal and oxidation stabilityReduces 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 protectionExtends seal, gear and bearing life
Reduces engine maintenance
Viscosity and shear stability across wide temperature rangeProvides effective lubrication at high operating temperatures
Chemically stable at high operating temperaturesReduces evaporation losses and lowers oil consumption
Excellent resistance to foamingMaintains film strength under rigorous operating conditions
Good low temperature fluidityPermits 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.

Specifications and Approvals

Mobil Jet Oil 254 has the following builder approvals
Engines
-Honeywell/Lycoming-TurbinesX
-Rolls-Royce/Allison Engine CompanyX
-CFM InternationalX
-General Electric CompanyX
-International Aero EnginesX
-Pratt and Whitney GroupX
-Pratt and Whitney, CanadaX
-Rolls-Royce LimitedX
-SNECMAX
-Honeywell/Garrett Turbine Engine CompanyX
Accessories
-Honeywell-Auxiliary power units and air cycle machinesX
-Hamilton Standard-StartersX
-Hamilton Sundstrand Corp.-APUs, constant-speed drives and integrated-drive generatorsX
Mobil Jet Oil 254
Approved against U.S. Military Specification Mil-PRF-23699F High Thermal Stability (HTS)X
PRI-QPL-AS5780/HPCX

Typical Properties

Viscosity
cSt @ 40ºC (102 ºF)26.4
cSt @ 100ºC (212 ºF)5.3
cSt @ -40 C (-40 ºF)11,500
% change @ -40 C after 72 hours-2.2
Pour Point, ºC (ºF), ASTM D 97-62 (-80)
Flash Point, ºC (ºF), ASTM D 92254 (489)
Fire Point, ºC (ºF)288 (550)
Autogenous Ignition Temp, ºC (ºF)399 (750)
TAN (mg KOH/g sample)0.08
Specific Gravity1.0044
Evaporation Loss, %
Evaporation Loss, % 6.5 hr @ 204 ºC, 29.5″Hg2.1,
6.5 hr @ 232 ºC, 29.5″ Hg7.4,
6.5 hr @ 232 ºC, 5.5″ Hg (Equals pressure @ 40,000 Ft. altitude)25.2
Foam, ml
Sequence I, 24 ºC0
Sequence II, 93.5 ºC10
Sequence III, 75 ºC (after 200 F test)0
Foam Stability, after 1 min settling, ml0
Rubber Swell
F Rubber, 72 hr @ 204 ºC, %20.8
H Rubber, 72 hr @ 70 ºC, %20.0
Sonic Shear Stability, KV @ 40 C, change, %0.7
Ryder Gear, average lb/in % Hercolube A2,715 ,114

Mobil Jet Oil 254 (Aviation)

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-04

3-2014

Copyright © 2001-2014 Exxon Mobil Corporation. All rights reserved.

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