JPD Motorsports

1999 f350 cc 2wd 7.3auto with Garrett gt40 turbo, 200/100 injectors, 4"down pipe into 5"exhaust, adrenaline hpop, custom camshaft, head work, bigger inter cooler, 6 position chip tuned by tony wildman, full built trans, 3:73 rears basically stock size tires 16s lowered 3/5.. City 14-15 empty (would be a lil better but drive it like I stole it everywhere) highway 18-19 at 75 mph empty. Towing 16k highway 12-14 avg at 70-72mph.

HabanaJoe

2012 F450 4.30 gears about 14 mpg empty at 70-72 mph, I tow 23,000 goose neck dual tire tandem and mileage is below 8 mpg, I don't even watch when towing just watch fuel gauge as to when I need to refuel. No chips, mods, bone stock.

ezstriper

Not a dually, 2500HD Duramax, DPF/cat delete, EGR blockoff, 8000lb tow tune with EFI live, just did a quick trip to Jax Fl towing a 32ft enclosed trailer, some fuel runs were right at 10, then some a tad over 12, all hand cal. seemed brand of fuel affected mileage..anybody else notice that ? this was running 70-75 with 3:73 and 285 tires...

575cat

Yes up here winter blend fuels suck.

bajaholic

2013 Chev 3500 Duelly, Diesel. Empty, 16.8-17.2 (dash) driving in the 73 mph range. Loaded, makes a difference on size and type of boat, but generally I am in the 9.8-10.3 range. Most of the boats I have hauled with it are Top Guns and Outerlimits. The OL's generally get better mileage, take it for what it is worth, but the last few I have hauled I got 11.2. Now, Center Councils..... Pull like a anchor... 8.1.

I had a 09 Chev 3500 Duelly before this one, was consistently about 2 mpg less in every category.

Wally

iTrader: (1)

I had a 99 crew cab chevy with same setup....had a hypertech tune in mine and all it could do was 10/11 city/hwy and 7-8 towing a 30' scarab......then i installed a 6" lift with 35's and had to drive with a tanker hooked to the truck to keep up with the gas demand!!

I will say this though....from reading the forums about these trucks/motors (454 vortec)......best thing you can do to them is a custom tune by someone who knows what they are doing...like Nelson or Westers etc.....and also they need bigger injectors then what they have stock

mike tkach

iTrader: (3)

2011 ford f350 with 6.7 diesel,3.73 gears truck is totally stock,18 mpg at 70 mph empty,10.x towing the fountain.the engine is so quiet compared to my old 05 f250 .

Cash Bar

2010 F350 4x4 Crew LWB 6.4 all stock.

No towing data but 14-15 from S Fla to Destin to LOTO and back running 75ish most of the way.

575cat

That,s a miracle right there , hand calc or lie-o-meter .

jmoore1225

iTrader: (1)

Cash, delete all the emissions crap & get some good custom tunes. Makes the 6.4 a completely different truck.