It cost me 2.5 (miles) open road and 3.5 towing compared to my 99 7.3 Diesel with same configurations.
DD is 15.5 in the summer and 15 in the winter with only little towing.
At interstate speed, 70 mph it can do 17 mpg and highway 60 mph 17.5 with not to much headwind.
It looks like you may loose up to 2 mpg if that.
I think you will like it, I do but I miss the diesel sound.

 

To the OP, not really what you asked, but, if you're wanting a CC, I'd seriously consider an F-350 instead of an F-250. I wouldn't like the payload hit from the heavier truck on a 3/4 ton chassis. My extended cab 4&4 truck has a 12,2000 trailer limit. A CC would be less, I think your 12K trailer may be over the edge on a F-250 chassis.

Someone asked about "at what speed" are you driving. That makes a huge difference in the mileage from my playing around. These trucks are awesome, and make lots of power, but they are like shoving a barn sideways through the air.

The slower you drive it, the better the mileage gets. I can get high 16's and low 17's consistently driving rolling hills highway if I keep the CC set on 60 mph (I hit 18 once at 55-and 19 once with a VERY hard tail wind). The variation comes in the winds, as sometimes the wind is barely a breeze, and sometimes it blows pretty hard up here.

I know no one wants to drive 60 anymore, as it's not "cool". But if you're really wanting to save gas, that's the easiest way. I drive my truck like an old man. Soft footing the gas pedal all the time, easy starts, and consistent speeds. If I drive at 70-75 my mileage drops to 14-15. 80 mph? Seriously? Forget about it. I think I hit 80 once, just to hear it when it was brand new.

Most of the time I'm in no hurry at all, so I'd rather save the gas. I'm sure these kids that blow my doors off snicker at me and my 60 mph, but I snicker back at every gas station I pass and watch them filling up.

Around town I probably average 12 in summer, and 8-9 in winter. Lots of warm up idling (I park outside) and hubs locked 80% of the time make a big dent in the mpg.

 

Driving the 6.2 with an automatic is quite the experience compared to the 460 with a 5spd stick that I've been used to for the last two decades.

On the exact same route in the old truck I'd run the hills in 3rd or 4th and just let the massive amounts of the 460's freight train-like torque pull loads up the grades rarely exceeding 2,000 to 2,500 RPM.

The new engine wants to rev like there's no tomorrow. It was hard for me to adjust to the new driving style as I'm simply not used to an engine running 5,000 RPM climbing steep grades fully loaded. Something about it just doesn't feel "right". That said, there's no shortage of power and my average speeds were higher than that of the old truck. Passing slower vehicles going uphill on steep grades feels effortless as the tranny will just kick down a gear or two and the entire rig just picks up and accelerates and does what my right foot asks it to do.

By the way, this trip afforded me an interesting comparison as one of my best friends accompanied me on the same trip, him driving a 2012 F-350 crew-cab dually with a slide-in and pulling his Jeep. His truck is the 6.7 diesel, and his hand-calculated fuel economy was 12.2 MPG on the same trip with his Lie-O-Meter reporting 14.1. Only once were we on a two lane divided highway going uphill side by side (Grapevine on I-5 for those familiar with ca roads) and the 6.2 pulled slightly ahead for about a mile or two, though he lost momentum when he came up on traffic, had to drop behind me and never caught up.

-Joe

 

I've hand calculated every tank of gas I've burnt in my truck. 3.73 rear end with 315/70R17's...probably have it dropped down to a 3.55 ratio (I'm sure someone could calculate it properly). I have seen a best of 18.5mpg while on a road trip, cruise set at 97km/h, and my lowest has been 9mpg. Averaging 11mpg and doing lots of driving is making me consider a diesel...

Keep in mind that the imperial gallon is larger than the US gallon (4.54 liters vs 3.78 liters I believe), usually a 20% difference in calculations, US figures being lower.

 

NOT GOOD!! I bet you will be in the 12MPG range.

 

<!--[if gte mso 9]><xml> <o:OfficeDocumentSettings> <o:AllowPNG/> </o:OfficeDocumentSettings> </xml><![endif]--> I just shared this same information on a different thread. This last summer I took our 2012 F250 (6.2) XTL 4 door short box with 3.73 on a 4,000+ mile trip. I had roughly 4500 miles on the truck were we departed. I was pulling a 255BH Conquest TT weighting in at 7000#’s. We left northern Wisconsin and made our first stop in Sundance WY. From Sundance we crossed the Big Horn Mountains (HWY16) and went to Cody, Yellowstone, Jackson WY, up to Glacier National Park, and then back home. Everyone who has traveled this route fully understands that I had some pretty impressive climbs on this trip. I drove the speed limit for a majority of the trip. Interstate speeds ranged from 65-70 and I drove 55-60 on most of HWY’s. I will say that I love driving this truck. I have all of the power that I could ask for. I prefer towing in manual so I could determine the shift points. I would like to add one more point. My father was traveling with me on this trip. He has the same truck as mine, but three months newer. He was pulling a fiver that weighs in at 9,000#’s. At almost every fuel stop, we put in the same amount of fuel (give or take ½ to 1 gallon). I do not understand how he was pulling 2,000 # more than me and was pulling a much taller trailer. Our driving styles are very similar and we were never more than a ½ apart on this trip. Anyhow, I took a picture of my information display when I pulled into my yard when I got home.

The results were:
MPG: 9.2
GAL: 432.9
Miles: 3998.3

 

[QUOTE=Bluejay Ford;13855542]<!--[if gte mso 9]><xml> <o:OfficeDocumentSettings> <o:AllowPNG/> </o:OfficeDocumentSettings> </xml><![endif]--> I just shared this same information on a different thread. This last summer I took our 2012 F250 (6.2) XTL 4 door short box with 3.73 on a 4,000+ mile trip. I had roughly 4500 miles on the truck were we departed. I was pulling a 255BH Conquest TT weighting in at 7000#’s. We left northern Wisconsin and made our first stop in Sundance WY. From Sundance we crossed the Big Horn Mountains (HWY16) and went to Cody, Yellowstone, Jackson WY, up to Glacier National Park, and then back home. Everyone who has traveled this route fully understands that I had some pretty impressive climbs on this trip. I drove the speed limit for a majority of the trip. Interstate speeds ranged from 65-70 and I drove 55-60 on most of HWY’s. I will say that I love driving this truck. I have all of the power that I could ask for. I prefer towing in manual so I could determine the shift points. I would like to add one more point. My father was traveling with me on this trip. He has the same truck as mine, but three months newer. He was pulling a fiver that weighs in at 9,000#’s. At almost every fuel stop, we put in the same amount of fuel (give or take ½ to 1 gallon). I do not understand how he was pulling 2,000 # more than me and was pulling a much taller trailer. Our driving styles are very similar and we were never more than a ½ apart on this trip. Anyhow, I took a picture of my information display when I pulled into my yard when I got home.

The results were:
MPG: 9.2
GAL: 432.9
Miles: 3998.3

As the air rolls over a pickup it exits near the top of the tailgate and slams into the front of a TT. It then flows along the TT body to the end.
When towing a fiver the air (generally) continues rolling up and over the front of the fiver and then continues down to the end.