Jet engine oil

[SMP142]

i have never really heard of anyone running an aviation grade oil in there car. i work with it all the time in my job and have access to it. pretty amazing how well the stuff holds up to the heat and wear. would it be worth a try? or just stick to normal synthetic? this is what i got from it...

MIL-PRF-23699
Type II Synthetic
viscosity of 5 centistokes at 100 Deg. C
made with neopentyl polyol ester base stocks

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,
% 6.5 hr @ 204 ºC, 29.5"Hg 2.1,
6.5 hr @ 232 ºC, 29.5" Hg 7.4,
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

 

[jdub]

Thought about this (got access to jet engine oil myself), but I wouldn't do it...here's why:

- Turbine oils do not have the deposit and corrosion control problems motor oils have to contend with...varnish is the most significant contaminant in a turbine oil. Therefore the add packs are very different.
- Jet engines are a rotating the assembly, balanced through out...turbine oils do not have to contend with the shear stress present in an automobile reciprocating engine (oil pump, cam lobes, piston rings, and any other areas where two mating surfaces squeeze the oil film out).
- The heat a turbine oil has to endure is much higher than a car motor...most of which occurs after the jet engine is shut down. While this my sound good, it affects the formulation making it less desirable for a car engine.

Also, take a look at the viscosity at 100 deg C...5.3 cst. Most automobile engines (including the 7M) are designed to run a viscosity of ~10 cst at that temp. I'm liking the cold flow viscosity though

 

[SMP142]

yeah i get what your saying about the stress it has to endure. didnt think about it. i mean you have the gear box, but that doesnt compare to to smooth mating surfaces such as cam lobes and such. makes sense. just thought i would throw the idea out there. ive always thought about it. guess i will just stick with "internal combustion" oil. thanks-

 

[jdub]

Jet engines do put stress on oil...it's just a different kind. Heat is the biggest factor, that's one thing jet engines put out way more than a car motor could ever imagine. That's why turbine oils use ester as a base stock, it can handle the heat.

If you want the same thing in a motor oil, get Red Line...it's also an ester base stock.

 

[SMP142]

yeah when i do my swap i am for sure using the redline tranny oil. prob gonna run it in the engine too. its goin in a 2jz in the northwest US. suggest a 5-30, 0-30? winters arent much of a factor b/c i wont be drivin it for the most part. but it only gets up in the 80sF in the summer.

 

[jdub]

5W-30 for the Red Line
0W-30 for the German Castrol (if you can get it at AutoZone)
5W-30 for Pennzoil Platinum

 

[SMP142]

cool thanks. yeah i heard alota stores stopped carrying the german castrol. have to check it out when i get back to wa.