Detroit Diesel Series 60 - DDEC4 500hp @ 1800rpm
Vehicle used on line haul high speed long distance work but was parked for three of the last four months. Between these two samples the truck has been used in City distribution work

Oil = Mobil Delvac 1 -5w-40 CH-4/SJ
Total sump capacity = 38 litres
Distance on engine = 895kkms - 556k miles
Distance on oil = 82kkms - 51k miles
Distance on 2xFF Donaldson ELF3998 filters = 82kkms - 51k miles
Time on oil & filters = 9 months
Temperatures in period = Low of 18C to High 45C
Humidity = Low 75% to High 96%
Top up oil required since OC = 13 litres

First column sample date 2/5/04 - kms on oil 82k
Second column sample date 3/1/04 - kms on oil <83k
Distance between samples = 700kms - 435 miles

Viscosity @ 40C 94 - 92
Nitration Abs/cm 40 - 40 our limit 60
Soot Index 3.8 - 3.7 our limit 4
TBN D4739 4.4 - 3.8 DD limit 1
PQ Index 9 - <1

Iron 97 - 101 DD limit 150
Aluminium 4 - 3
Chrome 6 - 6
Copper 30 - 34 DD limit 30
Lead 33 - 35
Silicon 11 - 12
Sodium 50 - 55
Water 1714ppm - 0%

This oil was NOT changed at this sample point

I welcome your comments

Regards