I have upgraded horse trailers and while the mileage in my Ram 2500 5.7 hemi was never good, it is now very expensive to drive, averaging 7.7 mpg. I am also very close if not exceeding the GCWR when fully loaded.
I am looking to upgrade to a 2014 Ram 2500 6.7 Cummins, 4x4 long box (8' bed). I cannot find any reviews on what people are getting for actual mileage on this model pulling a gooseneck or empty. The dealer tells me 18 - 20 and that I should not see much difference if pulling but that sounds a little too good to be true. I would appreciate some input from those who are actually driving this model - even if it isn't a long box or from 2013 models. Just to get me in the ballpark.