2011 Subaru Outback - Amsoil ATM 14,500 miles

[buster]

2011 Subaru Outback, 2.5L non-turbo engine w/CVT....

Miles on engine, 36,000
Miles on oil, 14,500
Amsoil 10w-30/ATM, Signature Series
OEM paper air filter (changed @30k miles)
Amsoil "EAO-12" oil filter.
4.2 qt sump
0.5 quarts of makeup oil added, 10k into run
Oil in service for eight months - approx 75% highway/25% city

Wear metals:

Fe, 10 ppm
Cr, 0 ppm
Al, 4 ppm
Cu, 6 ppm
Pb, 0 ppm
Sn, 0 ppm
Ni, 0 ppm


Contaminants:

Si, 21 ppm (some is gasket leaching)
Na, 9 ppm
K, 1 ppm


Oil additives:

Moly, 129 ppm
Boron, 37 ppm
Ca, 3190 ppm
Mg, 15 ppm
P, 645 ppm
Zn, 755 ppm

Physical/Chemical Properties:

Fuel < 1.0%
Water < 0.1%
Soot < 0.1%
Viscosity @100C, 12.3 Cst
TBN, 2.62
Oxidation, 61 abs/cm*
Nitration, 18 abs/cm

*Some of this oxidation may be from esters used as the dilutant for the oil additives*

 

[Turk]

Nice run, buster.

Looks like you can extend it a bit longer, if you like.

(Notice I leave it at "if you like".)

 

[Donald]

Great UOA. Thanks for sharing.

Were it me, I would aim for 15K OCIs and not push it much further. So for me that would be anywhere from 14K to 16K, given factors relating as to when one gets around to doing the actual oil change.

 

[Artem]

Nice run indeed. What lab was this?

 

[buster]

OAI.

 

[Brule]

Nice results & thanks for sharing. Strengthens the possibility I may try a 15K-20K run on this oil.

 

[buster]

Viscosity is up a tad. I'm not sure I'd go past 15,000, but it may be ok. You'd have to resample. Great results otherwise.

 

[Boss302fan]

I have been considering a new Subaru Outback.... Which engine is the most reliable? 2.5? How is the V6? Thanks... Sorry about the questions but I really like the Outback.

 

[randomhero439]

Very nice report

 

[Hollow]

Originally Posted By: Boss302fan
I have been considering a new Subaru Outback.... Which engine is the most reliable? 2.5? How is the V6? Thanks... Sorry about the questions but I really like the Outback.


H6, not V6.

The 2013 got a heavy redesign for the 2.5 engine, which looks like takes care of the weak area for the HG issues of the previous years.

The 2010-11 had some "steering shake" issues, for which there are multiple TSB.

All in all, for something that can get 30MPG on the interstate while being a heavy AWD vehicle...I'm a fan. Don't like the 2010+ models myself, as they got too big for my tastes, but they are still good vehicles.

 

[gonefishing]

Looking good buster! Still have your Accord?

 

[Pablo]

Is this your car? I'm confused.

 

[buster]

No this is not my car.

 

[BobFout]

 

[mr_diy]

So, is Oil Analyzers correct that oil is at critical level?
To me the prior Moly level seems most unusual, what oil was this?

 

[bluesubie]

Originally Posted By: mr_diy
So, is Oil Analyzers correct that oil is at critical level?
To me the prior Moly level seems most unusual, what oil was this?

Amsoil Series 3000.

-Dennis

 

[Eddie]

Oxidation=severely high suggests that the 14,500 mile oil change is too long. I'd try 10K and recheck.. Ed

 

[buster]

The old Amsoil formulations had oxidation issues. What I don't understand, is why Amsoil's own lab always flags oxidation as high with many long drain Amsoil UOA's. Why don't they take into account the virgin oxidation number? The only thing that may suggest some oxidation is going on is the viscosity which is creeping up, but no concern yet. The older Amsoil 30 grade formulations would thicken ino the mid 40 grade pretty quickly in some cases. This hasn't been an issue for awhile.

 

[buster]

Ok, actually they use Polaris Labs so that's why.

 

[INDYMAC]

I don't think the oxidation is much higher than a clean sample. But the nitration might be a little high. A TAN would have been nice to do some cross referencing.

I've always liked this oil the best of the signature series on paper and it has performed well in most S2000 UOA's that I've seen. The ZDDP levels look like an API SN oil now. Is it?