Dually MPG figures
 

Curious what others are getting for MPG out of their DUALLY tow rigs. Diesel or gas. Please post engine/gearing combo, and mpg figures empty and towing, and what you're towing. Please post honest and consistant numbers. Not "well one time with a tailwind, down hill, coasting I got xxx". The poll is for EMPTY hwy figures. Please vote and reply :cartman:

I get 13-14 on my 6.4 dually F350. I am deleted and run an h&s mini maxx.

My truck idles about 50% of the time according to my navigation system

07 PSD 4:10's (6.0) totally stock. Empty it gets 15-16 at 60mph but at 75 it's down to about 12mpg.....towing 14K drops to 9-10 at 70mph.

Same truck but an 04. Close to Same results as Russ. I'm towing around 12K.

2012 Dodge 4door 6.7l auto 4x4 w/ 3.73 gears. Also consider it has a 100gal transfer tank that is usually full and another 200lb of chains and binders in the tool box.

Empty she averages 12.3mpg

Loaded(32' GN fifth wheel loaded with equipment average 18k lb total) 8.3mpg

Average speed 65mph but in the 46k miles I have driven it I have not noticed speed to change mileage as much as it did on my 5.9l. She is 100% stock as she is the company truck.

2006 F350 CC DRW LWB 4X4 6.0 Powerstroke w/ 4.10's. No empty data. 11-12mpg towing 60-65mph 95% in the right lane. 9-10mpg running with traffic 70-75mph + and not letting people box me in. I have stock size tires with highway tread towing 12-13k. These numbers were hand calculated.

Is that corrected for your larger tires? Just curious.

07 ram 3500 6.7 4 wheel megacab dually 8500 pounds empty totally deleted , I have hit 19 empty and have hit 12 pulling my 42 fountain and usually cruise around 72 all hand calculated .

Wow.....seems like real world honest responses.....I really expected the guy with the F450 with 4:10s and bully dog chip, full intake/exhaust, 44 inch tires/20 inch lift kit to brag that he gets 23 mpg loaded and 33 mpg empty because its a Ford! :D

02 Ram 3500 4x4. 4.10 gears, manual trans, edge programmer, 285 tires. 14 empty @ 75-80mph hand figured