03 Dmax, 8660 mi on Kendall Super D XA 15W-40

[AITG]

Here's my latest change on my 2003 LB7 Duramax in a 3500 series Chevrolet ECLB dually.

Code:


Sample date 6-6-10 4-2-11 9-8-11 10-26-12

Miles on unit 32900 38685 46900 55560

Miles on oil 3479 5785 8215 8660

Fe 9 9 8 14

Cr 0 0 0 0

Ni 0 0 0 0

Al 1 1 0 0

Cu 12 13 12 0

Pb 19 10 8 0

Sn 1 3 1 0

Cd 0 0 0 0

Ag 0 0 0 0

V 0 0 0 0

Si 13 9 7 3

Na 2 0 2 3

K 1 2 4 0

Ti 0 80 88 0

Mo 0 0 0 50

Sb 0 1 0 1

Mn 0 0 0 0

Li 0 0 0 0

B 1 70 61 13

Mg 15 276 289 1165

Ca 3976 2067 1744 878

Ba 0 0 1 0

P 1139 1010 969 1059

Zn 1240 1202 1110 1271

Fuel Dilution
Soot, % volume
Water
Vis, 100 C cSt 13.5 14.0 15.3 14.3

Add oil 0 0 1 qt 2 qt


Oil life monitor at 17%.

I changed the oil because the truck may be in storage for an extended time - not because I anticipated the oil wearing out.

This may be the slowest wearing engine ever put in a light duty truck.

 

[volk06]

Looks like they did a reformulation at some point or your last 2 samples were with liquid titanium and this one was not. Nonetheless those numbers look great.

 

[AITG]

I suspect that may be a lab problem - the last two oil changes came out of the same case (6-1 gallon jugs per case).

 

[CarbonSteel]

Originally Posted By: AITG
I suspect that may be a lab problem - the last two oil changes came out of the same case (6-1 gallon jugs per case).
Something is up if the last two OCs were from the same case. The calcium is nearly double between the two samples and magnesium is off too?

 

[Donald]

TBN?

Who did the UOA?

 

[dnewton3]

Fe at 14ppm is believeable.

I find it hard to fathom absolutely no Cr, Ni, Cu, Pb or Al in nearly 9k miles ...

The Dmax is a fantastic low-wearing engine, but it's not THAT good.

 

[AITG]

Originally Posted By: Donald
TBN?


Can't answer that - I don't pay to have it checked.

Quote:
Who did the UOA?


Polaris.

 

[A_Harman]

Super D-XA has Titanium in it. The UOA should be picking it up. I think the lab mixed up somebody else's sample.

 

[AITG]

I emailed Polaris today, asking about the missing Ti, Al, Cu and other elements.

I'll let you know what response I get.

 

[AITG]

I got a revised oil analysis last night.

Code:


Fe 11

Al 1

Cu 12

Pb 1

Si 9

Na 3

P 3

Ti 98

Boron 67

Mg 313

Ca 1766

Ba 0

Ph 1018

Zn 1197


Other numbers are unchanged.

I didn't get an explanation of what went wrong but I'm impressed that they could go back and review the results as opposed to test-print-discard.

 

[dnewton3]

Much better and more believeable.

Seems very normal and that's a compliment to how well the Dmax runs with just about any qualified lube.

 

[AITG]

I'm mildly puzzled that re-running the sample didn't elicit some explanation as to why the first run was incomplete.

As long as they corrected the problem I'm satisfied. I'll stick with them for the future.