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Old 03-06-2013, 01:44 PM   #1
ringe
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Default 3 UOAs Mobil 0w-40, Mobil 5w-40







Vehicle was stock for the 0w40, and stage 1 with a custom tune, stock intake for the 5w40 UOAs, except for the last thousand miles on the last UOA, which was custom Stage 2 with COBB intake.

Any thoughts on the high copper content over the mid-range? Seems to indicate prolonged bearing wear, but these oils are coming up good each time (except for the first UOA back at ~20k miles, which was mobil 0w-30). Interesting how it dropped dramatically with the latest test. Wonder if my sampling technique wasn't as good before. We'll see on the next UOA which will also be Mobil 5w-40 Diesel.

From right to left on the last chart, the oils were Mobil 0w30, Mobil 0w40, Mobil 5w40, Mobil 5w40.
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Last edited by ringe; 03-08-2013 at 04:13 PM.
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Old 03-06-2013, 02:11 PM   #2
ringe
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Also, here they are in code, in case these links break:

Code:
OIL             M5w40    M5w40    M0w40    M0w30
MILES IN USE    6.3k     6k       4.3k     3.5k
MILES           97k      86k      29k      21k
SAMPLE TAKEN    02/17/13 08/11/12 11/29/08 05/17/08  

ALUMINUM        3        3        3        3
CHROMIUM        1        0        1        1
IRON            11       8        11       14
COPPER          7        26       12       36
LEAD            1        2        1        5
TIN             0        0        0        0
MOLYBDENUM      31       16       83       96
NICKEL          0        0        1        1
MANGANESE       0        0        3        1
SILVER          0        0        0        0
TITANIUM        0        4        0        0
POTASSIUM       0        3        0        1
BORON           47       23       148      46
SILICON         7        6        16       19
SODIUM          13       71       11       5
CALCIUM         1452     1378     3142     2328
MAGNESIUM       661      736      16       12
PHOSPHORUS      904      924      878      643
ZINC            1084     1087     1017     767
BARIUM          0        0        0        0
     
      

SUS VIS 210F   67.0     66.2     67.1     57.1
cSt @ 212F     12.16    11.93    12.17    9.40
FLASHPOINT F   470      400      425      360
FUEL %          <0.5     <0.5     <0.5     TR
ANTIFREEZE %    0.0      ?        0.0      0.0
WATER           0.0      0.0      0.0      0.0
INSOLUBLES      0.3      0.3      0.2      0.3
TBN             2.2      2.1      4.9      3.6

Last edited by ringe; 03-06-2013 at 02:22 PM.
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Old 03-06-2013, 02:13 PM   #3
ringe
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Dudes at BITOG think that high copper is normal in pre-2010 Subaru engines before 100k miles. Is that accurate?
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Old 03-06-2013, 02:27 PM   #4
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Quote:
Originally Posted by ringe View Post
Dudes at BITOG think that high copper is normal in pre-2010 Subaru engines before 100k miles. Is that accurate?
Yes, could be the high zinc interacting with the oil cooler. Looks ok now. You can find more with a google search.

-Dennis

Last edited by bluesubie; 03-06-2013 at 02:35 PM.
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Old 03-07-2013, 01:53 PM   #5
some dude
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What does TR stand for in the fuel%?
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Old 03-07-2013, 05:31 PM   #6
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No idea.
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Old 03-07-2013, 05:41 PM   #7
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Thanks for sharing.

The elevated copper is not accompanied by elevated tin or lead, so it's not bearings. Most likely the oil cooler and nothing to worry about. It's strange how these cars react to different base stock and additive chemistries, especially the copper numbers. Search my username for my UOA history. My car didn't show elevated copper on GC or RT6, but it sure does on Redline.

The old SM version of M1 0w30 actually held up pretty well. It even stayed in grade. Not advisable for a Stg II car though.

Anything special about the OCI ending at 85,500 mi? That's M1 TDT, right? The UOA at 28,917 mi was M1 0w40? The 0w40 held up a bunch better, TDT should be substantially thicker than 0w40, flashpoint should be higher too. Different tune? Different driving conditions?

@ some dude:
TR stands for trace.
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Old 03-08-2013, 04:12 PM   #8
ringe
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Quote:
Originally Posted by gpshumway View Post
Thanks for sharing.

The elevated copper is not accompanied by elevated tin or lead, so it's not bearings. Most likely the oil cooler and nothing to worry about. It's strange how these cars react to different base stock and additive chemistries, especially the copper numbers. Search my username for my UOA history. My car didn't show elevated copper on GC or RT6, but it sure does on Redline.

The old SM version of M1 0w30 actually held up pretty well. It even stayed in grade. Not advisable for a Stg II car though.

Anything special about the OCI ending at 85,500 mi? That's M1 TDT, right? The UOA at 28,917 mi was M1 0w40? The 0w40 held up a bunch better, TDT should be substantially thicker than 0w40, flashpoint should be higher too. Different tune? Different driving conditions?

@ some dude:
TR stands for trace.

Yeah, was impressed by the 0w-40 results. Might end up just using that in the future after I test a few other types. The OCI ending at 85500 had, I think, more makeup oil than I indicated originally. It was a lot of mountain driving (in the boost, or engine braking all the time). The other OCIs are mainly city driving with some highway.

The 0w-30 tested there would have been pre-SM. SL I think.

The tune was certainly different for the last two; I forget that I didn't go Stage 1 with a protune map till later on. That might be why. Edited OP to reflect that.
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Old 03-08-2013, 07:50 PM   #9
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Quote:
Originally Posted by some dude View Post
What does TR stand for in the fuel%?
Trace (detectable, but too little to quantify).
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Old 03-11-2013, 10:39 PM   #10
gpshumway
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Quote:
Originally Posted by ringe View Post
Yeah, was impressed by the 0w-40 results. Might end up just using that in the future after I test a few other types. The OCI ending at 85500 had, I think, more makeup oil than I indicated originally. It was a lot of mountain driving (in the boost, or engine braking all the time). The other OCIs are mainly city driving with some highway.

The 0w-30 tested there would have been pre-SM. SL I think.

The tune was certainly different for the last two; I forget that I didn't go Stage 1 with a protune map till later on. That might be why. Edited OP to reflect that.
Ahh. The different driving conditions and tune could easily account for the difference between M1 0w40 and TDT.

Did you have some really old stock of M1 0w30 you used in 2008? API SM/ILSAC GF-4 was released in 2004.
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Old 03-12-2013, 04:53 AM   #11
ringe
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Hmm. Guess it was SM then.
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