well we use the same oil and filter in the '06 that we used in the '03 and the '01 ...
rotella synthetic and fleetguard filters and the '06 with 5 miles on it is blacker than our '01 and '03 with 5,000 ...
EVERY 325 motor owner i've spoke to has the same comment about instantly dirty oil ...
How about a small survey. How many of us have the new 6. 7 and the oil went pure black within 300 miles or so from brand new. Also, how many people have good clean oil? Lets see if it's a engine by engine case, and narrow it from there. I am well aware than diesels turn oil black, but I have never, to include the big rig's seen any thing like it.