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Old 06-22-2016, 07:17 PM   #101
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Latest 3500 mile trip looks like we averaged a bit more than 13 mpg. We tried quite hard to find Shell V-power so we would have methanol free fuel.

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Old 09-02-2016, 09:11 PM   #102
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2016 25' International
San Luis Obispo , California
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I get around 9.8mpg at just under 70 in my 2014 Ford Raptor screw pulling a 25FB Inrtnational.
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Old 09-03-2016, 02:17 AM   #103
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We get 11 mpg when pulling at 60-62 mph, when not 15 city and 25 highway.
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Old 09-03-2016, 04:18 AM   #104
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I just upgraded from a ˝ ton gas GMC which got around 10 MPG pulling my 23D, to a ľ ton Diesel Chevy. On my first trip (around 1000 miles) pulling the 23D I ended up with 15.7 MPG average. I'm hoping that once the engine gets broken in, I'll end up around 17, but I'm happy with 15.7 really. The biggest advantage for us is the larger fuel tanks, thus longer range.
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Old 09-03-2016, 09:02 AM   #105
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07 dodge 4/4 auto 6.7 cumalong ,3.73 gears (. 6 speed auto is double overdrive). Coat to coast average is 12.5 mpg with the 13 31' classic...
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Old 09-04-2016, 08:16 AM   #106
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I get 15.5 mpg on my truck read out average. Truck is 2014 GMC 1500 gas.AS is 31' 1978.


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Old 09-05-2016, 11:45 AM   #107
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Apache Junction , Arizona
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Typically 12-13 when towing. Up to 18-19 when not towing. F250 diesel.
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Old 09-05-2016, 12:48 PM   #108
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Battle Lake , Minnesota
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Just checked our Ecodiesel overall mpg in 7700 miles since new, 24.9 mpg abut half of those miles towing our Airstream, some hauling lumber or pulling our utility trailer.
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Old 09-05-2016, 01:30 PM   #109
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I get about 18 mpg with my usual driving habits (lots and lots of driving in the Texas "hill" country and to/from Dallas from west of Austin.) This is in a 2012 Ram 1500 with a 6-speed trans, 4X4 crew-cab, small V8 (4.7L) and 3.92 rear end.
This truck was originally spec'd out for a fleet-buyer for work-crews to use around the DFW area, (super-duty cooling pkgs, skid-plate-protection for construction-sites, dual locking axles, towing-pkg, Ramboxes, cargo-protection and extra-tool-storage built-ins, H.D. flooring, higher-output alternator/electric and lighting, etc.) but I'm guessing he didn't savor the idea of workers "hot-rodding" around with a Hemi so he ordered the smaller V8...an engine I actually preferred at the time anyway,... however he took delivery of only a portion of the original order, therefore leaving the dealer with an attractively-priced, well-equipped "left-over" ... which seemed perfect for my planned use....daily driver for a year, then retirement on a ranch, visits with grandkids piled-in a crew-cab, and with only occasional, light towing. The popular Hemi-engine would be overkill for my tastes...or so I thought at the time. And I prefer gasoline over diesel for similar reason.


Having acquired the truck I liked, I then set about to customize it in small ways that further met my needs/preferences. These small changes cannot be simply "ordered" in a replacement-vehicle...they consist of truly personalized things that cause me to be "in love" with my current truck. Buying a completely different truck would require I perform all these little tricks over again, and I hate that thought.
Then along came a decision to get an Airstream a year later, and we've now taken 8 trips with it,...several short ones of a few hundred miles, and two longer ones of a couple thousand, one along the coast and the other up thru the mid-west hills. This has shown me that this engine is fine for level and gentle-hills Interstate, but marginal for the mountains.
I am not someone who is in the habit of changing vehicles every other year. I drive 'em until they're either totally worn-out or they're wrecked, ....so I'll keep it awhile longer in the hopes it can do the job,...but I'm wondering about our plans to drag the AS out West and Northwest. We'll have to see.
Anyway... the thought I'd like to contribute is for those who've discovered their differential gearing is less-than-optimal. When I was in my young twenties I worked for a while for Houston-area Toyota dealerships as an engine and rear-axle specialist. This provokes me to encourage those who don't like their rear axles to don't think they've got to throw the baby out with the bath-water. For a few hundred dollars you can have a reputable shop change your pinion/ring gearing to one more appropriate for towing.
For towing, a rear axle ratio anywhere in the range of 3.92 towards 4.10 or 4.30 would likely make you a happy person, and that change can be done for less than $400. For those who've found themselves owning a non-locking rear axle, for a $1K you can change out the entire setup, and keep the rest of the vehicle you might already favor.
Unfortunately for me, I've got the right rear axle... I just might not have the right engine, which is not as simple, nor as inexpensive a change-out as it would have been back in the good-ol' Hot-Rod days, now that everything is so computerized. I'm hoping our first trips out-west don't end up with me disappointed in the truck I've so lovingly personalized.
BTW, this truck gives me 18 mpg generally, and about 12 mpg when towing the 'stream, most of the time around 65 mph. I'm OK with that.
Hope the comments are helpful.
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Old 09-05-2016, 02:05 PM   #110
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I have a F150 ecoboost 2011 vintage. super crew long box and max tow package. I drove 1500 miles from Kitchener to Denver. uphill all the way, and got 13.5 MPG at 58 MPH. I drove solo and picked up DW in Denver at the airport. Then we toured around Wyoming for 10 days and it averaged out to the same. The return trip, in spite of being downhill, brought the overall average down to 12 MPG. DW refused the 58 MPH and insisted on turning the wick up to 65. Amazing what a big factor wind resistance plays on milage.
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Old 09-05-2016, 05:01 PM   #111
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Bozman , Maryland
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Pulling my FC 28, loaded for camping: best 400 mile average 13.8 @ 55; worst 400 mile average 11.8 @ 60.
2015 GMC Sierra 1500 6.2 liter; 8-speed. Max trailer tow package.
Best 400 mile average running empty: 23.8@60-65. Worst 400 mile average running empty: 20.8@75-80.
"Loaded" includes 450 lbs of people and dog; Honda EU2000i generator; 5 gallons of gas in the bed; satellite dish; propane grill; camp chairs; camp rug; chest with "out-of-season" clothes; boots box, 40 lb. toolbox, torque wrench;air compressor and miscellaneous cleaning supplies and rags. All that goes in the truck.
Premium (91 octane) fuel is specified, but I've run lower in a pinch.
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Old 09-05-2016, 05:38 PM   #112
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I have 25' EB and pulling it with 2016 3.2L diesel ford transit van. Have not towed a bunch yet but looks like I might get between 15 to 16 mpg. So far very pleased with overall performance.


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Old 09-05-2016, 05:38 PM   #113
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2005 dodge 2500 4x4 quad cab 5.9 Cummins diesel with 215k on it 3.73 rear end I get 12-13 at 68-70mph and 13-14 at 65mph. Airstream is 2009 27FB usually at about 7000 lbs.

I get 12-13 as well pulling my 20ft Seacraft boat that has a T-top and weighs with fuel and boat trailer about 3500-4000 lbs.

When I towed a 24 ft car hauler that weighed 10,000 lbs cross country I got 12-14.




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Old 09-06-2016, 04:45 AM   #114
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What's your towing MPG?

I'm lucky to get 10 mpg when towing our '14 FC 27FB (with our '12 Ram 3500 6.7 CTD 4x4 CCSB SRW, 3.73 gears, 56 gal. Titan fuel tank). I carry the heavy stuff in the bed of the truck (Weber grille, spare parts & tools, extra spare tires, etc). Of course, we pull a lot of hills between WA. and anywhere else but 10 mpg is what I shoot for. (Have never come up short on power though.)


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Old 09-06-2016, 10:03 AM   #115
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hartselle , Alabama
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24 foot argosy towed by 2000 ford expedition 4x4 5.4l 3.73 gears. At 70 mph I get 12mpg, at 65 I get 13 mpg according to system computer.
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Old 09-06-2016, 10:55 AM   #116
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just got back from Nevada City in Ca, about a 3,000' elevation gain i think . approx 11-12mpg towing my 5,000lbs + gear etc ... 2010 Tundra 5.7 ...
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Old 09-06-2016, 11:00 AM   #117
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My 2000 V-10 Ford Excursion average is 9.5 MPG on average roads at 60 MPH Pulling my 1989 28 ft Squarestream
When I pull from PHX AZ to the RIM above Payson it is like 6 MPG in the hills. That is 1200 ft to 7500 ft in about 120 miles with lot of uphill and down hill then up again and again.
BUT has LOTS of power and goes uphill real nice. Nice that gas is only $1,87 today
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Old 09-06-2016, 11:49 AM   #118
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Usual average is around 12.5 mpg plus or minus a tenth or two. I tow at 55 to 65 mph. The highest ever recorded towing in 14.3 with everything lightly loaded. Plus cooler temps help diesel mileage.
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Old 09-06-2016, 12:20 PM   #119
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2009 25' FB Flying Cloud
1973 31' Sovereign
Mount Angel , Oregon
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This should make You-All so happy with your TV

We purchased our used tow vehicle, a 2010 Ford F-350 V-10, with the previous owner's claim of 10.5-11 MPG regardless of towing or not. Reality: 7.6-9 MPG towing up / down / all around at 62-68 MPH. This does include Cabbage Hill at 65 MPH. I do drive slower off the interstates, around 55-58 MPH.
Oh yes, towing a 25ft FC, tanks full. It does tow nicely.

Susan
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Old 09-06-2016, 01:02 PM   #120
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Def mpg

When towing, F350 6.7 SuperDuty diesel with shell, 14K+ miles, and 30' Classic, we get 11- 13 in the East. Haven't been to the West yet.

When not towing, city - 14 MPG or so. Highway - 18 MPG.

But for DEF, We get 895 MPG. Yea Haw.
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