Thoughts on the Eco-diesel Rams

I can't talk for the eco but I have a 2014 6.7 Cummins 3500, love it, mileage is about 25+ on the open highway. The def sucks but hopefully soon I'll be deleting it off the truck. As far as maintenance it's not that bad, I refill my def maybe 6 months, two fuel filters kinda stink since they are a dealer only, but had two oil changes at the dealer until I learned they were putting regular oil in and not full synthetic like factory from Cummins, so I do it myself, cost about $100 with filter and rotella full syn. And my mileage will only get better once my truck is officially broke in at 100k miles.