Mobil Jet Oil II VOA

Joined
Nov 16, 2002
Messages
35,626
Location
NJ
All ester. Oxidation figure is double what you'd see in something like Red Line, which uses approximately 40% ester in some grades. Red Line oxidation figure is 90 -120 depending on the grade. [Linked Image] Link
 

CT8

Joined
Oct 9, 2014
Messages
15,365
Location
Idaho
Strange post because I was thinking about that oil the other day.. I haven't seen the oil since I quit work and last night I had a pleasant dream of being at work. thanks for thr picture.
 
Joined
Jul 8, 2012
Messages
4,817
Location
Nashville, TN via Memphis
I’m assuming that the phosphorus is for fire resistance. I base that on the fact that most commercial and corporate aircraft specifically call for fire-resistant hydraulic fluid, which is phosphate-ester based.
 

MolaKule

Staff member
Joined
Jun 5, 2002
Messages
23,069
Location
Iowegia - USA
I’m assuming that the phosphorus is for fire resistance. I base that on the fact that most commercial and corporate aircraft specifically call for fire-resistant hydraulic fluid, which is phosphate-ester based.

it's mainly an anti-wear agent for the bearings in the bearing cells and the accessories of a jet engine.


 
Last edited:
Joined
Jul 8, 2012
Messages
4,817
Location
Nashville, TN via Memphis

Just curious - Do you know what component of phosphate ester hydraulic fluid is responsible for its fire-resistant quality?

Always wondered that.

And, I’ve always assumed that the phosphorus content is what makes it irritating to skin and mucous membranes.
 
Joined
Oct 1, 2010
Messages
8,285
Location
Michigan
Yes. The oxidation number that I got on Redline 5w30 when I had a VOA done was 108. Polaris had a cow over it.
 
Joined
Jan 4, 2016
Messages
2,625
Location
704
Some guy on the Russian oil forums is running this in his old Lada as an experiment, and it actually seems to be working out quite well for him. Not something I'd do, but interesting none the less.
Can I get a link to that please? Tried looking it up at work with no luck.
 
Joined
Feb 15, 2003
Messages
13,379
Location
Jupiter, Florida
Some guy on the Russian oil forums is running this in his old Lada as an experiment, and it actually seems to be working out quite well for him. Not something I'd do, but interesting none the less.

When I worked in the Mobil Oil flight department, there was a 2.8L Camaro driving kid who used the drain turbine oil in his car. We were testing Mobil Aviation products in the fleet, so the Mobil Jet II was drained out after short order and Mobil 254 was used in the fleet instead. Then the 254 was drained! We had an A LOT of the drain oil. He used it without any failures that I am aware of. However, I do remember his engine being quite noisy/clattery on the MJ II and I'm not sure if the 254 was any better 😅😅😅😅
 

MolaKule

Staff member
Joined
Jun 5, 2002
Messages
23,069
Location
Iowegia - USA
When I worked in the Mobil Oil flight department, there was a 2.8L Camaro driving kid who used the drain turbine oil in his car. We were testing Mobil Aviation products in the fleet, so the Mobil Jet II was drained out after short order and Mobil 254 was used in the fleet instead. Then the 254 was drained! We had an A LOT of the drain oil. He used it without any failures that I am aware of. However, I do remember his engine being quite noisy/clattery on the MJ II and I'm not sure if the 254 was any better 😅😅😅😅
 

MolaKule

Staff member
Joined
Jun 5, 2002
Messages
23,069
Location
Iowegia - USA
...However, I do remember his engine being quite noisy/clattery on the MJ II and I'm not sure if the 254 was any better 😅😅😅😅

Well, if it required an 11 cSt or an 8.5 cSt oil then a 5 cSt Jet oil would not fill in the mechanical clearances very well.
 
Joined
Aug 14, 2019
Messages
422
Location
Toronto
No Moly or Zinc? Pfft my 04 Corolla with oil consumption will chew through this.

Jokes aside, thanks for this, pretty cool to see what goes into those massive engines that push us into the sky and keep us there.
 
Joined
Jan 18, 2020
Messages
2,485
Location
United States
my old mercedes used this for the supercharger, you need an NBC mask when you drain the used stuff out. the hellcat probably uses this as well
 
Joined
Aug 11, 2005
Messages
262
Location
Northern Nevada
When I was a young sailor working on J-52 P8B engines our oil was MIL-L-23699B. (strange that I still remember that) A few of us were tempted to try it in our cars but never did.
 
Top