Jeep in the U.S. is asking a $4,500 premium for the diesel engine, which makes it $2,305 more expensive than the Hemi V8. A bit of quick math using national average fuel prices reveals that the Ecodiesel will pay for itself relative to the Hemi V8 in about 35,000 miles (56327.04 Km). Guess you really have to want the 30lbs of extra torque.