Let me take a guess. He replaced the tensioner pulley and the belt because of the catastrophic destruction that may take place if you lose the belly. I think I remember reading that somewhere. As for the oil change I'm sure he's deleted and his truck doesn't smell its farts anymore or breathe them for that matter.I'm a little confused. Why did you change the tensioner? and not just the belt? Or did I just miss something?
I drive a 2012 CTD and barely get 3K miles on oil change interval with sampling. What are you doing differently to get 11K mile interval. Man that's aweswome.
Thanks for the time and good luck!