We tow a 16400 GVWR fiver with a TWD F350 with your 6.7. We consistenty get 11.6-7 MPG at 63 MPH. We have the 6 -spd auto & 373 gears with DRW.
Truck works well, up or downhill, no problems noted over the last 40K miles.
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Mike & Sheila + Toppi
'13 CC 36CKTS, MorRyde IS, Kodiak Disc Brakes
'13 F350 Lariat CC 4x2 DRW, Curt Q20, BlueOx Bedsaver
Members: CCRVC, CCRVOC, FROG, Escapees, 5th Wheel Forums
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