I had an 11 F250 6.7 with just under 30k miles it was never in the shop once in that time. Same for my brother's farm service pickup which has 45k miles on it now. I bought a 13 Ram 6.7 this summer and I'll be looking into a 15 F250 down the road. In 7k miles, its been in the shop 6 times and I just got the 4 Check engine light the other day and a new one service exhaust soon message. I've had issues with Check Engine Lights always some update that is supposed to fix it. Had a major lack of power that was finally traced down to the active airbox. I still don't think I have as much power as my ford had. Other complaints are the capless fuel filler makes it hard to fill unless you hold it at a certain angle and you can't add anti gell without a funnel. If I could get a ford 6.7 in my mega cab Laramie I would be happy. If you want to learn more about how to increase fuel mileage, have a peek at this web-site.