Put 120K plus on my company issued 2011 Ram 1500. Shitty 4.7L engine grenaded at 30K and was replaced. Had 90K on the replacement engine when I turned it in. Nothing other than tires and regular maintenance. This was an oilfield truck.
Bought a '14 Ram 1500 Laramie Limited with Ecodiesel in August to drive for work. Crew cab, 6'4" bed, air suspension. I've driven new F-150's and rode in plenty of new GMC/Chevy trucks up to Denali trim. The Ram is a nicer truck inside and can do everything the others can. I've got 20K on it so far. Averaging 20.2 mpg for the life of the truck, including 3600 miles of hauling a truck full of hunting gear towing a 18' box trailer where we averaged 10 mpg due to aerodynamic drag alone. Regular commuting I see 21-23 mpg.
I have a '97 Dodge Ram 2500 that I drive when I need a truck to beat the hell out of hauling gravel and such.