Amsoil Series 2000 in a 2003, Subaru WRX

[TeeDub]

Miles on engine, 91,000
Miles on oil, 11,000
OEM air filter
Amsoil EAO-20 oil filter
Oil Consumption, 0.5 qts
2.0L turbo motor

Physical/Chemical Properties:

viscosity @ 100C, 11.46 Cst
Oxidation, 36 abs/cm
Nitration, 36 abs/cm
TBN, ASTM D4739, 4.4

Wear Metals:

Fe, 3 ppm
Cr, 0 ppm
Pb, 10 ppm
Cu, 1 ppm
Sn, 0 ppm
Al, 2 ppm
Ni, 0 ppm

Silicon, 13 ppm (Note: baseline formula contains approx 4 ppm of polymeric silicone as an antifoam additive)


Oil Additives: (API/SL formulation)

Boron, 22 ppm
Mg, 227 ppm
Ca, 3041 ppm
P, 833 ppm
Zn, 967 ppm

Personal Comments: The Pb looks a tad high here in comparison to the trace levels of other wear metals. This could be due to the regular use of fuel additives (Amsoil PI), or the infamous particle streak through the bearings. Engine has used Amsoil with 10k OCI's since purchased and runs like new.

 

[ekpolk]

I'd be quite happy with this report in an engine approaching 100k miles (the end of its adolescence?). I'd think the Pb would be just barely at the threshold of "light concern" and would perhaps pay attention to it in the next UOA to see if maybe it is a streak, or something that might call for more attention. Continue on course and lose no sleep over this UOA!

Is this car a manual trans version? Does it see any lugging on a regular basis. If so, that could theoretically explain the little bit of lead.

 

[TeeDub]

Yes, it's a five speed transmission and it may be upshifted early to save on fuel - a good point! I suppose my friend could try the Amsoil 5w-40 or 10w-40 here, but that seems like picking nits to perhaps drop the lead by a few ppm.

TS

 

[deven]

Those are some awesome wear numbers for a oil run of 11,000 miles(AL, 2ppm is insanely good) I love Subaru engines!

 

[Titan]

11 ppm pb is NOTHING! Don't worry about it. Great report, great oil: miniscule engine wear.

 

[INDYMAC]

I see this is API SL, but don't see an SAE grade. What is it? Is the SL still available from AMSoil?
Very nice UOA!

 

[Pablo]

Series 2000 = 0w30 (11.46cSt)

 

[buster]

Nice report!

 

[TeeDub]

This is the API/SL, ILSAC GF-3 version of the Series 2000, SAE 0w30 formulation. I'm running their latest, (ACEA A5/B5,VW 503.00 rated) version of this same oil in my Audi TT turbo and should have a report on that in about two months.

TS

 

[Jim 5]

One other thing with respect to manual transmission engines:

I have observed on small block ford v8's that the sides of the cranshaft journal (thrust) bearings show significantly more wear than their Auto Trans brothers. This is due to the pressue of the clutch pushing against the crankshaft in a manual application, and this does not occur with an auto trans.

I have actually observed the difference in the wear on these thrust bearings, so it must also show up in UOA's.

 

[unDummy]

Looks excellent. Your driving style, engine, and oil used are a perfect match. I woudln't change a thing!

Any soot or insolubles level?

 

[TeeDub]

The # of oxidation/nitration would translate to a insolubles level of 0.3%-0.4%, based on my experience.

TS