Replaced my 2013 Ram Laramie 4x4 Quad Hemi after 256000 km with a 2018 Limited with the EcoDiesel. I should get around to listing the 2013 for sale I suppose. I've put 2500 km on the '18 so far with 2 long highway trips - no towing or heavy loads - and have noticed coolant 'missing' already...