From F150 ecoboost to F350 6.2 ** New truck content**

For the gas F-350 6.2L expect more like 11-13 MPG. If your going to go threw that big of a change F-150 to F-350 get a diesel 6.7L. On mine not towing I get about 16-19.5 MPG on my 6.7L. 12.5-14 MPG on the flats then down to 7-8 MPG in the mountains/large hills. Get a diesel ,better mileage + the higher cost of diesel prices vs. gas prices; still saves you about $4-$7 per fill up.Plus diesel pulls better and lasts longer.