John Deere 624H Mobil 1300 MX 250 and 312 Hours

[RedOak]

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?

 

[Jim Allen]

Can't answer your questions directly, but your interesting post deserves at least one comment.

I wonder what the condemnation limits are on that engine from the manufacturer, soot especially. Sometimes you see them expressed as a percent. 116 ppm is 0.0116 percent, which is pretty good. I get mixed numbers about how much is too much, but from 2-4 percent is what I've seen. In the past, the ASTM had a 4.8% limit on CH-4 oils. I think (but did not verify) that CI-4 is 5% or more. To convert PPM to percent, simply divide the PPM by 1,000,000 and multiply by 100, e.g. 116/1,000,000= 0.000116 x 100= 0.0116.