I have a new 2008 King ranch Crew diesel. It was an expensive truck, but each of the big three can be spec'd pretty close to the same price. I was a little surprised about the price myself at first but after having driven the truck for almost one month, I can say if any truck is worth the price, it's this one. It has everything, and is solidly made. I also know the invoice pricing on the truck as well, and when I was looking, I found the trucks to not be marked up over invoice that much. Perhaps some dealers will "deal" more once the trucks have been out a few months but that did not affect me, as I got below invoice pricing on mine. I doubt it would have benefitted me much to have waited. The Ford employee pricing and executive pricing was not that inexpensive. As for the mileage, I cannot attest to the tester mentioned, but mine is getting about 13-14 in mountainous short distance driving, unloaded. I have gotten almost 17 on a four hour round trip, half pulling a lightly loaded (3000#) trailer. It so far does not get as good mileage as my 2002 7.3L, but it is not that far off, and I expect it to get better. It really seems to me short trips are really going to hurt the mileage on this diesel more than most. I would expect the 6.4L to get on average about 1-2 mpg less than the 6.0L in the same truck, but with the extra power and quiet refinement, it was worth it to me. I did NOT buy this diesel expecting great fuel economy.
John M