I did end up trading. Even with the few trips I do, but with more planned this year the diesel was looking better. I found out I had 4.30's in my 01, so I would never be able to get anything really above 11mpg. So by going on that number, did some math with my father, it does cost more to run the V10 than the diesel. In the end I pay $2k more for the 02 diesel than my 01 V10.