The two trucks I posted in my earlier post are identical except for engine. The V10 actually had a little lower mileage, but the diesel was worth a little more than $4000 more. All you guys mentioning rebates need to remember that the leftover 7.3's had rebates as well. Also, Ford offers low to 0% financing at times on these trucks so calculating interest on money that you saved by going V10 is a little off. I guess I should calculate interest on a high yield savings account for the money saved on fuel. My Ford Expedition also had a plug for the winter and if I lived in MN I'd plug it in, so same electric usage. See what I mean, these details can make the numbers go the other way as well.

Most of the guys I've heard from get between 12-14 MPG with the V10. A lot of people see far worse than 12-14. Remember, EVERY time you tow or haul the diesel will increase the MPG gap between the gas and diesel.

BTW, the regular duty oil change interval for the 6.0 is 7500 miles.