I just can't let my oil go for 10k miles. The oil is just so dirty that I change it myself every 5k between dealer changes. Was able to get filters off ebay for real cheap and probably have enough for the rest of the life of the truck

I also replace one quart of oil with 1 quart of Lucas Synthetic Oil Stabilizer. This seems to cut down on the sludge that can build up in the oil, however now that I am changing the oil every 5k miles, probably not as big deal. I like the Lucas Oil products and have had a lot of success with it.
Another issue with the oil being so dirty is oil blow-by that this engine experiences. The soot in the blow-by is going right in to the EGR flow, the intercooler, and the turbo charger. I am looking to install an oil separation system that "MoparEcoDiesel" implemented on his truck (please refer to YouTube). I have used these systems on other vehicles and they do a great job of keeping intake and downstream components clean as a whistle.
Maybe after installing the oil separation system, I can entertain longer periods between oil changes.