Mileage on truck: 81359 km
mileage on oil:8528 km
Fluid and filter NOT changed
2006 Dodge 3500 Cummins w/ Amsoil BMK-11 bypass
Type of mileageP: mostly city, some highway. Lots of stop and go, short trips, lots of idling.
Lab used: CAT oil lab, Edmonton, Alberta
Oil was in truck from 29 Sep07- 12 Nov 07
AFE stage 2 intake
Power Service and Howes as fuel additives
Wear metals are as follows:
Fe-11
Cr-0
Ni-0
Si-5
Al-3
Pb-1
Sn-0
Cu-1
Na-4
K-6
B-71
Ag-0
Mo-2
Mg-174
Zn-1354
Ca-3468
Ba-0
P-1177

other:

ST-8
OXI-16
NIT-7
SUL-21
W-N
A-N
F-N
V100-14.3
V40102.8

Overall I am pleased with this sample. This is the first sample with my bypass on, and seems to have dropped my soot count. Last sample was with Delo 400 15W40 and soot was 16, whereas it is now half that.
My only question is in regards to the secondary numbers like soot and OXI- how are these measured? is it parts per million, or measured differently?

These results are typically identified by infrared analysis. Infrared analysis (FTIR) can be used to detect an extremely wide range of organic compounds. However, in routine oil analysis of engine crankcase oils, FTIR can be used to monitor: Fuel Dilution, Fuel Soot, Oxidation, Nitration, Glycol, and Water. The infrared absorbance spectrum of new (unused) oil is compared against the used oil sample and the difference is reported.

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