with a F350 dually , 6.7 diesel and 3.73 gear; what kind of fuel mileage?

 

Welcome to FTE!

Depends on how you drive, how fast you drive, how much you're hauling, how tall your load is, flat road or not, windy or not.

Not trying to avoid your question but there are a lot of factors.

I get around 13-14 in town, 18-21 going 65 mph empty, 17-19 going 75.

Add the 18,000# 5er and I get 11-13 at 65 and 8-9 at 75.

Hope this helps.

 

10.25mpg- 22.34mpg or somewhere in that range.

 

15 to 16.5 around town empty , 18 to 20 highway empty @ 65 to 70mph
9.5 t0 11.5 pulling a high profile 5ver @ 65mph

 

2012 Ford F-250 Super Duty MPG Reports | Fuelly