Dodge have an " approved " diesel engine in the form of the 5 cylinder Mercedes engine used in the Sprinter. The engine has been around for years and has proved to be reliable, long lived and economical. It would make a nice fit for the 1500. The Cummins at 1000lbs+ is just to heavy. Another alternative would be the engine used in the Liberty but the Mercedes is probably more suited to the task. So IF DC were to offer one would you go for it?