What are the fuel economy reports from owners for the 08 f250's 4x4 super duty diesels? With less than 600 miles i am getting 12-13mpg.

 

It should get much better then that after the truck breaks in for a while. You should notice a change after 3000 mile's..

And also welcome to FTE for the best place for Ford stuff. Enjoy your stay and check out the threads as well as your chapter.

 

Yea welcome to get a better idea go to the 2008 6.4L forum to find out more about gas mileage there is a break in period like sglaine said so it should get better also depends on how hard you drive it