I've talked to 4 of my buddies (not in the business) who own Dodge diesels and they all claim to get 18-25 MPG. They range from 2005 3500 to 2010 2500. I currently run Ford's and when they pull a 20' trailer with three Z-turns and other small equipment, I am getting an average of 7 MPG. My mechanics have looked at them and says eveyrthing is functioning and not sure why the mileage is bad. My drivers says they dont idle excessively. They got to 2-4 commecial sites a day. The fuel bill is killing me!!!! Please help!!!