Gas vs. Diesel (Ecodiesel)

There is a lot more to cost of ownership than fuel. You have all the other maintenance as well. Differential services, transmission service, fuel filter, etc. So yes you have to compare everything. Last I checked dodge required differentials at 60k and maybe 30 k when towing. With full synthetic fluid that is required you a looking at a hundred dollars an axle. My ford owners manual states that I don't end front differential service until 150k and even with severe duty towing rear differential is sealed for life. ( no service required).