Specifications and Approvals

Mobil Jet Oil 254 has the following builder approvals
Engines
-Honeywell/Lycoming-Turbines	X
-Rolls-Royce/Allison Engine Company	X
-CFM International	X
-General Electric Company	X
-International Aero Engines	X
-Pratt and Whitney Group	X
-Pratt and Whitney, Canada	X
-Rolls-Royce Limited	X
-SNECMA	X
-Honeywell/Garrett Turbine Engine Company	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 Jet Oil 254
Approved against U.S. Military Specification Mil-PRF-23699F High Thermal Stability (HTS)	X
PRI-QPL-AS5780/HPC	X

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 92	254 (489)
Fire Point, ºC (ºF)	288 (550)
Autogenous Ignition Temp, ºC (ºF)	399 (750)
TAN (mg KOH/g sample)	0.08
Specific Gravity	1.0044
Evaporation Loss, %
Evaporation Loss, % 6.5 hr @ 204 ºC, 29.5"Hg	2.1,
6.5 hr @ 232 ºC, 29.5" Hg	7.4,
6.5 hr @ 232 ºC, 5.5" Hg (Equals pressure @ 40,000 Ft. altitude)	25.2
Foam, ml
Sequence I, 24 ºC	0
Sequence II, 93.5 ºC	10
Sequence III, 75 ºC (after 200 F test)	0
Foam Stability, after 1 min settling, ml	0
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 A	2,715 ,114