New guy here, w/first post.
I bought an 07 mega cab w/5. 9 on 6/12/07 had black oil @ 150mi.
Changed oil @ 700mi was black again within 100 mi.
Going to change it again tomorrow with 2250mi, I expect it to go black also.
It is not just the 6. 7's with this problem, this is my first...