Here's my result from 3000mi/94hrs, not much change from the Agco 15w-40 at 4000mi HERE oil I changed from last Oct. Going to run this another 50hrs or 2000mi whichever comes first, then sample again.
Yes, what brand and model of air filter do you use? I should consider getting one.
It's just the 4" pleated Napa 4496, it's the updated filter for Dodge diesel from the 2". Also don't forget it's winter so not much dust when the snow flies.
My last test was 3 for the Oct sample