My Unimog, 25600 mi OCI, about 700 hrs, sump 29.6L, 10L makeup oil (2.5l/6250mi since new)
Anchorage-Halifax-Antwerp-Ulaan Baatar-Germany-Venice-Antwerp-Halifax-Anchorage
Delvac 1 SHC 5W40
according to my calculations the makeup oil decreases contaminates by about 16% using the exponential mixing equation
Fe 44
Cr 1
Pb Cu 9
Al 4
Si 5
Na 17
K coolant none
Mg 36
Ca 4553
P 1387
Zn 1405
B 284
Water none
Vis 13.0
Fuel Soot 0.4
TAN 2.84
TBN 11.5 even with about 8000mi of 300-3000ppm S diesel
Next time I'll try for 1200 hrs = ~45000mi
Charlie
Anchorage-Halifax-Antwerp-Ulaan Baatar-Germany-Venice-Antwerp-Halifax-Anchorage
Delvac 1 SHC 5W40
according to my calculations the makeup oil decreases contaminates by about 16% using the exponential mixing equation
Fe 44
Cr 1
Pb Cu 9
Al 4
Si 5
Na 17
K coolant none
Mg 36
Ca 4553
P 1387
Zn 1405
B 284
Water none
Vis 13.0
Fuel Soot 0.4
TAN 2.84
TBN 11.5 even with about 8000mi of 300-3000ppm S diesel
Next time I'll try for 1200 hrs = ~45000mi
Charlie