The additional cost spread between diesel fuel / gasoline, additional maintenance, and initial purchase cost of a diesel makes it very difficult to justify unless you need a diesel for serious towing and the eco would not be the best choice. I have a 6.4 in a '21 PW (2500) and it gets 15ish mpg average some highway, some medium size city driving.
WANTED-- DEAD or ALIVE: '70 Duster--- VS29H0B274908-----UPDATE---ENGINE BLOCK FOUND---Still looking for the B-5 car. '79 Power Wagon W14JE9S137761 or 763