What kind of gas mileage is the norm when plowing? I have a '97 F250 HD/351/extended cab with an 8' Western Pro Plow and around 650 lbs of ballast. During the first storm I got around 5 MPG but I didn't think it was too bad condering we had 7" of wet, heavy snow and I was driving around all night using 4WD. This storm we got 5" of the fluffy stuff & used 2WD a lot on the roads but only got 4MPG at best! I at least expected the same if not better. I average around 11 MPG normally.