2nd UOA results for Volvo V40 1.9TD / LM Synthoil

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Tettnang, Baden-Wurttemberg, Germany
Basic block: Renault 1.9TD 130hp but detuned by Volvo turbo settings to 115hp for old V40 phase 2 diesels.
Oil: Liqui Moly 5/40 High Tech Synthoil & Volvo filters.
Total KM: 190,000 OCI 10,500km Top up 0.3 ltrs.
Useage: Not much autobahn, no traffic jams, but lots of stop starts and driver abuse.

Lab: Blackstones Comments: Good.

10,5K km(Last)/9.5K km / Uni average for 8K km OCI
Al 4 / 5 / 7
Cr 1 / 1 / 4
Fe 33/ 24/ 45
Cu 6 / 5 / 5
Pb 3 / 2 / 5
Moly 3 / 3 / 28
K 3 / 5 / 1
Boron 63/ 62/ 82
Si 14/ 11/ 14
Na 3 / 5 / 54
Mg 5 / 8 / 228
Ca 3107/ 2751/ 2481
Po 1039/ 942 / 1081
Zn 1245/ 1049/ 1212

Sus: 66.3 Should be: 66-78 Previous: 67.9
Flashpoint (F): 440 Should be: >410 Previous: 425

No fuel, Antifreeze or water detected, Insolubles: 0.5 Previous 0.4 Limit 0.8
TBN Not measured at last UOA, but was 4.7 with previous (VOA 9.6)

My question:
Why have all the main additives and Flashpoint increased?? Is this batch variability, or has LM improved the specification of this oil??

The oil looks good for about 15K, but I will be changing to a cheaper part synthetic 5/40 diesel oil next service. Not sure if the Fe increase is part of a trend, as the other wear metals did not increase.
 
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REPLY FROM BLACKSTONES:
The additive package isn't too different. The numbers seem a little higher and that's from the make-up oil. The biggest difference of 356 ppm was in calcium, and that really isn't that much more. I like to think of parts per million (ppm) as a bucket full of a million BBs. In this case, of the million BBs, only 356 BBs are calcium. It doesn't look like Liqui Moly changed their package, but that type of thing does happen from time to time. Make-up oil also contributed to the flashpoint as used oil has a lower flashpoint than new oil. .3L isn't much oil, but it is enough to change the numbers slightly as it did here.

Thanks for contacting Blackstone!
LY

UMM! I don't agree as the VOA of the oil has Calcium at 2586 and the Flashpoint at 425, so it could not result in the figures being effected by the top up oil.
 
2nd REPLY FROM BLACKSTONES:
We ran the sample you provided us again, and oddly enough, the readings were higher than the samples from your original report.

The numbers are as follows:

Ca: 3193
P: 1078
Zn: 1240

We double checked our spectrometer and it was calibrated correctly. Maybe the oil used in June was from a different batch and was slightly different than the one used for this December sample. We would double check the June sample, but unfortunately we only keep the samples for a week before discarding.

If you would like, you can send us a sample of your virgin oil from this recent batch, and that will help us understand the changes a little better. We'll run that sample for no charge.

OK, So just to conclude, this looks like a change in specification, as far as I can see.
 
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