The ecodiesel is a con job. Half the power of the gas V-8 engine with a higher purchase price and higher maintenance costs is not a good deal by any stretch of the imagination. Need to compare a full size diesel engine with a full size gas engine if you plan to tow a heavy trailer.
I would not want to be the guinea pig on an American made diesel for a passenger car. American manufactures have a tiny fraction of the experience of European companies when it comes to passenger car diesels. The lowly Rabbit was very reliable but compare that the notorious GM diesel powered sedans that were a complete failure and cost their owners dearly.