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Old 06-02-2015, 11:47 AM   #1
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2015 F250 w. 6.7 Diesel

OK gang... I just bought a 2015 F250 w. 6.7 Diesel. Taking our first trip with our 27 ft. FC in a week. With the undersized fuel tank at 26 gallons, how many miles are you fellow 2015 F250 Diesel people getting on a full tank???
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Old 06-02-2015, 12:05 PM   #2
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We have the long bed so we have a 37 gallon tank and routinely go well over 350 miles between fill ups; but we get about 12 mpg towing so once your engine is broken in a bit (after about 10,000 miles) you can probably plan on about 250 to 275 miles between fill ups (allowing for a margin of safety.)
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Old 06-02-2015, 12:19 PM   #3
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We have a 2015 F350 with same sized tank. We installed a replacement 50 gallon tank. used to stop about every 250 miles for fuel as we average 13.8MPG. Now we can run between 500 and 650 miles between fill ups. The advantage is we can select our fuel, be careful on price and avoid the mom and pop stations that are often tough to get into and out of.

Enjoy your trip.

Bud
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Old 06-02-2015, 01:33 PM   #4
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I also replaced my 26 gallon with the Titan 50 gallon tank, had the Ford Dealer do it.
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Old 06-02-2015, 01:40 PM   #5
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Just finished a 3000 mile trip and averaged 12mpg.
2015 F350 Supercrew 4x4 Platinum
3:55 axle pulling a 28ft Airstream international at the posted speed limit 65-70mph
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Old 06-03-2015, 01:09 PM   #6
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MPG with 6.7 engine

I have a 2014 F350 (3.55 rear end) with same engine, I get 12.5 MPG, however, when in the Mtns, with a grade, I get around 9 MPG. On a level rd I get 13.5+, and w/o the trailer, I am getting 19.5. I pull a 30" FC. Love the truck... remember, you have to break in the engine, took around 5k+...
Good luck and enjoy the truck, I sure do...
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Old 06-03-2015, 01:35 PM   #7
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I had a 26gal F-250 6.7L. First of all doesn't it tick you off Ford does something like this!

I pulled an AS about 5,500lbs. 70 mph about 11.5mpg. You will be hunting for fuel every 200 miles to keep enough reserve not to run out of fuel. Keep a 5 gal. spare with you if traveling out West. If you have never owned a diesel before, do NOT run it out of fuel. It is not like a gas engine where you just fill it up and off you go. You run out of diesel and it is going to be towed to have the fuel system primed. Good luck and recommend getting and aftermarket tank in short order.
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Old 06-03-2015, 02:51 PM   #8
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Man......I sure glad I didn't trade my 2000 Dodge with the 5.9 on a new Ford like I was going to do last week. I get 17.6 mpg pulling my 23FB that weighs 6000# loaded, I get 20 - 21 not pulling.
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Old 06-03-2015, 03:18 PM   #9
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"I had a 26gal F-250 6.7L. First of all doesn't it tick you off Ford does something like this!"

Ford does it for weight control and bed capacity as explained to me by the Ford dealer who installed my Titan tank; and Firedog1's tank as he told me about this particular dealer. They did a terrific job by the way, three hours start to finish - now about 900 range without the AS behind us.
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Old 06-03-2015, 03:39 PM   #10
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Had a Transfer Flow 45 gallon installed in my 2006 Chevy diesel and do not regret the cost for one minute. It has made a world of difference in peace of mind not having to plan a trip on where the next diesel filling station is. Allow you to get off the beaten path a lot more and actually enjoy the Airstream journey.
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Old 06-03-2015, 03:41 PM   #11
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That sounds like a great new truck. We would love to see some pictures.

Brian
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Old 06-03-2015, 04:06 PM   #12
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I'm really happy with my F350/6.7. It's smooth, powerful, quiet and very comfortable. Mileage is a bit less than my F250/7.3, but then it has a lot of pollution control that the F250 doesn't have.

I'm seeing similar results to others in the thread. It does seem to be getting better as I get more miles on the truck. We're betting close to 8,000 on her (Big Ruby) now.
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Old 06-03-2015, 07:54 PM   #13
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2015 F250 w. 6.7 Diesel

Drove my 2012 6.7 40,000 miles and mpg never changed from day one.My 2015 6.7 has 15000 miles on it and the mpg has not changed either.The break in non existent.This truck is wonderful.


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Old 06-03-2015, 10:48 PM   #14
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Butch Dowse

We have a '12 250 with 6.7, about 34,000 miles pulling a 27' FB.
Mileage is about the same as discussed in the thread.
At my age, smaller tank and overactive bladder works out about right.
It was my understanding that Ford lopped off about 5 gallons from the original fuel tank to add the DEF tank. I carry an extra 5 gallons as we travel the western states a lot. Thinking about striking out for Alaska and if we do, will strongly consider installing a larger fuel tank.
As previously stated, don't run out of fuel and don't try to cheat the DEF system and don't trust every green handle you see, some are gasoline.
Happy Truckin' you're gonna love the truck.
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