Oil analysis done by Cat SOS Services 624H Deere Log Loader 6.8 Liter inline 6 turocharged JD engine 40768 Hours on lift 22,000 hours on this engine Hard daily service feeding a sawmill infeed. WOT most of day. 250 hours 312 hours Cu-2 Cu-0 Fe-22 Fe-14 Cr-2 Cr-1 Al-3 Al-2 Pb-1 Pb-0 Sn-3 Sn-1 Silicon-8 Silicon-7 Sodium-4 Sodium-0 Potassium-6 Potassium-3 Moly-37 Moly-33 Zinc-1063 Zinc-1078 All wear above is in parts per million OIL CONDITION Soot-116 Soot-119 Oxidation-30 Oxidation-31 Nitration-51 Nitration-51 Sulfation-35 Sulfation-37 Water and Gycol negative in both samples Vis-14.9 Vis-14.8 OIL CONDITON PARTICLE COUNT (ct/ml) Interesting the shorter drain had a bit more wear. This in a non egr motor. The lift was built in 1998. Mobil Delvac 1300 MX has done a good job in this lift. After this next change I am switching to Schaeffers 7000 CJ 15w-40. I will be starting with 400 hour drain intervals. I have a difficult time understanding the condimnation limits of the particle count in the manner they are stated. Anybody now how to convert these over into percentages especialy on the soot which will cause abrasive wear?