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Old 08-28-2014, 07:13 PM   #1
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F250 Diesel mpg?

Can anyone give me real-world fuel efficiency numbers, both towing and not, for their F250 with 6.7 L Diesel engine? We're looking at a 2011 model, but have heard that the mpg isn't so great. Thanks.
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Old 08-28-2014, 07:48 PM   #2
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Hi Rollster. The 11 F-250 diesel is likely better than a gasser. I have a 13 F-350 and have been quite pleased with its overall performance.

I get 13 +/- 1 miles per gallon while towing my Airstream at 60 mph. Throw in a headwind, and it can drop to 11. I love a tailwind where I can book a 16 mpg.

I get 16 mpg around town. I can book 19 mpg on the highway with little wind, but a headwind will drag than down.

I got 10mpg with my V-10 E-350 van while towing the same Airstream. So my diesel is 30% more efficient, and has way more power, and cost way, way more to own and operate.

The Ford Super Duties are big, strong, heavy work horses. I didn't need it to tow my Airstream, I just wanted it because of the technology and complexity of the diesel. I love the way the engine braking works going down long hills.

I agree with the folks at CanAm and their towing strategies. Short overhangs, independent rear suspensions, and a good hitch set up makes a nice tow vehicle. You won't pull 60 mph up steep grades, and you need good trailer brakes coming down those steep grades, but you can certainly tow with a V6 SUV. Back in 1986, my folks towed this Airstream with a Bonneville!

I don't think Ford is the mileage champion in the diesel pick up market. The Ram and GM probably do slightly better.

David
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Old 08-28-2014, 07:54 PM   #3
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I have a 2009 F250 Super Duty with 6.4L diesel towing a 2009 30' Classic. I like my diesel, but it's expensive to maintain. My towing mpg is about 11.5. However, mpg is irrelevant with a diesel because you'll find it significantly more expensive to maintain and repair than a gasser. I believe if I had a 25 footer I'd get a gasser regardless of gas mileage. The savings on routine maintenance items such as fuel cost ($.50-$.60 more per gallon for diesel, fuel filter changes ($120 every 10K miles), oil changes (15 qts. every 5K miles), coolant changes ($150 every 60K miles), transfer case fluid change ($300 every 100K mile), etc. will more than compensate for mpg. A major repair on a diesel engine can run as much as $8K.

Don't just take my word for it. Talk to a Ford service manager or diesel mechanic. Diesels have their place and are great to have when you need that extra pulling power, but purchase price and mpg is like the proverbial tip of the iceberg.
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Old 08-28-2014, 07:59 PM   #4
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I have the exact engine you are asking about:

So, real world numbers from my world with New York State Fuel crap forced into everything. And I do factory and dealer maintenance intervals: non towing on a highway on cruise control: 21 to 22 mpg, non cruise control 20-21 mpg (of note: this is at 70 to 75 mph. I have found that at 55 on cruise control I can get 22.5 up to 24 mpg).

Towing at 70 to 75 with a full load of "stuff" 13.5 to 14.5 mpg. This was on a 6,000 mile trip from NY to Breckenridge Colorado with a full load in the trailer and 4 bikes and stuff in the bed at an average speed of around 70 mph. Keeping the same speed up mountain hills and using engine brake down hills.

Around town which means North Continent US climate and doing a 10 mile round trip grocery run (so not truly warmed up) gets me in the range of 17-18 mpg.

When I tow my trailer or boat I am totally comfortable with the truck and its ability. Am I totally worried about the cost...maybe not so because I towed with an underpowered vehicle to the west in the past and feel that joy of trip is worth more than micromanaging pennies per gallon.....and I am fortunate to not have to do so and still camp.

For what it is worth my thoughts, and I am sure there are plenty that will argue my numbers.
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Old 08-28-2014, 08:17 PM   #5
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We tow our 87 25' Sovereign with a 2005 F250 6.8L V10 gasser with a 4.10 rear end. It gets 10.5 to 11 mpg towing, and 15 mpg unhooked. With what the guys above said about their diesel mpg and the 30 to 50 cents more per gallon of fuel it appears that fuel cost per mile is about the same. I will say that to change spark plugs is $100, $10 per plug and $100 per plug that breaks apart and needs special extraction work to get it out. So to change plugs could cost as much as $1100. The main reason I like a gasser over a diesel is because the sound of a diesel can cause me to have episodes of vertigo and that is no fun while driving.
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Old 08-30-2014, 05:52 PM   #6
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Thanks, everyone. Part of the reason we're looking at a diesel instead of gasser is engine longevity. But I understand that's just a rule of thumb and not always the case. Our last F150 had over 200,000 when we traded it in.
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Old 08-31-2014, 03:24 PM   #7
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Tow my 2008 Classic 25FB with a 2010 Tundra Double Cab 5.7L. 11 to 13 mpg towing at 60mph on roads through the souteast. Can't see owning a diesel for towing a 25ft.

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Old 08-31-2014, 03:34 PM   #8
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We like the extra safety provided by a 3/4 diesel (braking and torque) for towing our 25'.
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Old 08-31-2014, 03:54 PM   #9
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Always get a kick out of the Toyota truck owners who post off topic in every truck thread. Should I comment on how much better my Cummins is, no! Because the question was about Ford trucks, I believe. Jim
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Old 08-31-2014, 04:21 PM   #10
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Quote:
Originally Posted by Rollster View Post
Can anyone give me real-world fuel efficiency numbers, both towing and not, for their F250 with 6.7 L Diesel engine? We're looking at a 2011 model, but have heard that the mpg isn't so great. Thanks.

Just a reminder about the OP's question, specific truck, year and engine.

And I'll add I think it would be helpful if you qualified your MPG numbers as hand calculated or from the trip computer.

My two cents.
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Old 08-31-2014, 05:01 PM   #11
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I have a 2015 F250 6.7 diesel and tow a 2012 30 ft FC. Have had the truck since late April. Mileage so far has been roughly equivalent to my 2002 F250 7.3 diesel. I'm getting 18ish not towing and 12-13 mpg towing on normal roads. Towing mileage drops a little in hilly areas. Truck has great power and the tow/haul mode is nice. Compared to the 2002, the 2015 suspension seems to be softer but easier riding. For me a compromise between the two would be about right. Both trucks have 4x4 drive.
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Old 09-03-2014, 03:09 PM   #12
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2014 F250 4x4 6.7 towing 25 International. 14.2 miles per gallon on 4000 trip from Texas to Colorado to Wyoming and return. This probably includes 1000 miles without trailer. Towing would say 12.6 miles per gallon. non towing I am getting 18.5. Have 3.34 rear gear. it is heavenly to drive.
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Old 09-04-2014, 06:45 PM   #13
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We have identical set up as coopstream, same trailer, same engine, except our F250 is a 2013. Basically same results, about 12.5mpg towing, about 19mpg highway not towing. This all is based on the trip computer in the truck. I did put a cab high Leer cap on in May and it "seems" like I picked up about 0.5mpg on the couple of non towing highway trips I've made since. I have a jeep wrangler that I use for my daily driver so don't drive the F250 around town much.


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Old 09-05-2014, 09:03 AM   #14
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Originally Posted by zigzagguzzi View Post
Always get a kick out of the Toyota truck owners who post off topic in every truck thread. Should I comment on how much better my Cummins is, no! Because the question was about Ford trucks, I believe. Jim
The OP doesn't own a Ford 250 yet so giving him info on other options is worthwhile. My MPGs are hand calculated.

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