So here is what I've got after 20K on the oil. ALUMINUM 2 CHROMIUM 1 IRON 13 COPPER 2 LEAD 2 TIN 0 MOLYBDENUM 3 NICKEL 0 MANGANESE 0 SILVER 1 TITANIUM 0 POTASSIUM 2 BORON 4 SILICON 3 SODIUM 1 CALCIUM 3303 MAGNESIUM 9 PHOSPHORUS 1161 ZINC 1492 BARIUM 0 SUS Viscosity @ 210°F 70.3 cSt Viscosity @ 100°C 13.04 Flashpoint in °F 415 Fuel % <0.5 Antifreeze % 0 Water % 0 Insolubles % 0.2 TBN 8.5 Here is a link to my last UOA at 10K miles on the oil. 10K Analysis I am using a Motor Guard (TP) bypass oil filter which I change every 3K and add 1 qt of oil to replace what comes out with the filter. Every 10K I change the full flow filter. This seems to be working well for me so I'm going to keep at it until UOA tells me I need to change (which I suspect and hope will be never). Unfortunately my stockpile of CI-4+ Rotella 5W/40 is about to run out so I'm probably going to switch to Schaeffer 9000 for my make-up oil. Let me know what y'all think.