Have primarily used Schaeffer 700 15w40 syn blend in this pre-egr, factory rebuilt Detroit 60 12.7L. Thru the prodding of my Schaeffer rep, I decided to try the 711 10w30 syn blend. Was a little leery with the engine getting close to 500K miles on it. But, I gave it a shot. Not too bad of results. Numbers very close to the previous 15w40 numbers on multiple samples, except, this one shows the 711 has some pretty good levels of Zinc, Phos, Calcium, etc. More than their 15w40, and I didn't lose nearly as much TBN. Used the same amount of oil, about 2 qts over the 20K miles. Sump capacity 9.5 gallons.
Miles on Motor 493387 Miles on oil 20100
Iron 28
Chromium 2
Lead 6
Copper 1
Tin 0
Aluminum 1
Nickel 0
Silver 0
Titanium 1
Vanadium 1
Silicon 3
Boron 1
Sodium 22
Potassium 2
Magnesium 985
Calcium 1494
Phosphorus 1276
Zinc 1573
Moly 68
Barium 0
Vis @ 100c 11.53
TBN 8.14
Oxidation 16
Nitration 8
Miles on Motor 493387 Miles on oil 20100
Iron 28
Chromium 2
Lead 6
Copper 1
Tin 0
Aluminum 1
Nickel 0
Silver 0
Titanium 1
Vanadium 1
Silicon 3
Boron 1
Sodium 22
Potassium 2
Magnesium 985
Calcium 1494
Phosphorus 1276
Zinc 1573
Moly 68
Barium 0
Vis @ 100c 11.53
TBN 8.14
Oxidation 16
Nitration 8