The v10 from Ford was changed slightly in 06 or 07 and the fuel economy increased. We get 11 from ours which is an 08. Which is almost the same as the 6.4 diesel. We only pay 500 over invoice of fords so it's really hard to justify switching brands.

For a daily commute truck I don't see anything wrong with the V6. If he was buying it strictly as a tow vehicles then the v8 would make more sense.

Depending on time frame, if I was looking for truck as a daily driver and was considering the v6, I would wait til ford comes out with the new v6 with ecoboost in the f150. It's suppose to be out early this next year and is currently in the tarus sho.