MPG

With headwind milage can get down to 4mpg out in ne., ks. and wy.
done had it happen before average I run is between 8-12 depending on load, idling and etc. some of the 6.7 fords were getting like 6-7. gear ratio matters to.
After five years I'd say 8-12 would be about average. I've been told that some were getting 15-16 and six months later they'd say 7-8.
The same ones tell me all the money their making and a year later they're selling their equipment saying they made nothing.
So it is what it is and thats it.

 

I doubt anything is wrong with your numbers. I get more than that but i drive the truck with poor driving habits you can EASILY see 6-7 MPG loaded heavy. Do your trucks have all the stock equip? Once the trucks get backed up from the egr / dpf they are going to get poor mpg.