allen8106
Burrton. KS
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Joined: 01/31/2012
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I have an 09 GMC Sierra 2500HD, 6.0L Vortec, 3.73 rear gear. My 5ver weighs in at just under 10k. I get 8-10 while towing and 15 when not towing
2010 Eagle Super Lite 315RLDS
2009 GMC Sierra 2500HD 6.0L
2011 Pit Bull Terrier (Jake)
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Cooper5thwheeler
Brighton, Michigan
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Joined: 02/04/2012
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I am recently upgraded and love the solution. 2011 GMC 2500 HD Denali Diesel and 2011 Heartland 40' BigHorn 5th wheel. The new transmission they put in is slick. Ford lured several engineers from GM to build their newly upgraded F250 & F350. You will see a lot of similar features. GMC fuel tank is generous, Ford's is only 24 (or 26) and makes it more difficult to haul distances.
I am getting 11.8 to 12.5 mpg when hauling a big trailer (40'). When unhitched I and leaving the hitch in the truckbed (adds a bit of unecessary weight) I am around 17.6mpg.
Love the truck! Love the trailer!
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Useless Nut
USA
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Joined: 01/17/2012
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2004 2500 Dodge Cummins. 17 mpg average, unloaded. 10 to 11 mpg pulling 11K fiver.
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BV101
midwest
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Joined: 06/11/2009
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8 to 9 mpg pulling, 10-11 without 5ver. been down to 5mpg with a really strong headwind.
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RWalt
Midwest
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Joined: 06/21/2011
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With the Mods that we have done on our Ford, we get 10+ pulling BigCountry 3250 at 73- 75mph and 14 in town
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Gunspeak
Eganville
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Joined: 04/11/2011
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2011 Ram 1500 5.7 Hemi. Pulling a 2010 Puma 295 BHSS. I get 9 miles to the gallon on the regular highway. Biggest complaint is the small gas tank on the Dodge - Mre power than I could ever use.
2011 Dodge Ram 5.7 Hemi
2010 Puma 295
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foster hill
mass
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Joined: 11/22/2011
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I have a 2010 4 door F350 DRW 4x4 6.4 diesel running our 3455sa keystone montana i get between 8.5~10 mpg with summer fuel and about .5 less with winter fuel. The superduty gets 12-13.5 normaly on highway not towing.
''Nothin better too do''
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Antique Deere
LaGrange, IN USA
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Joined: 08/12/2003
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2009 Ford F350 with V10 gas engine. Towing a fifth wheel weighing 11,800# mileage is 7-8.5. Empty highway mileage is 12-14.
Bob T
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RVUSA
Orlando, FL, USA
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Joined: 01/04/2005
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Durhamcutter wrote:I have a 33 ft Copper Canyon and a one ton dully Dodge a 1963 model truck, pulling I get about 13 and without the trailer on the road I can get about 23.
Theres a pic I'd like to see.
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Mile High
Denver, CO
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Joined: 02/05/2008
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RVUSA wrote:Durhamcutter wrote:I have a 33 ft Copper Canyon and a one ton dully Dodge a 1963 model truck, pulling I get about 13 and without the trailer on the road I can get about 23.
Theres a pic I'd like to see. Must have that slant-6 (aka lazy-6) with a 3-on-the-tree. 
2006 Ford F350 4X4 SB CC SRW Powerstroke 6.0
2007 Montana 3400RL 5th - hi gloss, electric awning, remote system, Onan 5500, G614, JTs, wet bolts, Dish, Ariston W/D, 5th Airborne.
"A picture is worth a 1,000 words, but it uses up to 12,000 times the memory"
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