F250, 6.7L Unloaded Mileage

I don't hot-rod my truck, but it does get surprisingly good mileage. In town I get around 16 to upper 17. On the highway it gets around 20 mpg easily. On a recent long freeway trip I got 21.0 at 70 mph and 19.8 at 80 mph with the cruise set. Surprisingly, with all the monitors these trucks have their on-board computed mileage is extremely close to hand calculating.

Towing my 11K lb. trailer on a recent trip of about 4500 miles, I was getting upper 13s at 58 mph and 12 to 13 keeping it around 65 mph max. In the Canadian Rockies I was getting 11 to 12.5 towing. I also have the 3.31 gears which improves mileage.

16.4-17 city mix

18-20 highway

These mpg numbers also include regens.

Truck in sig nets: 12-15 city summer, 16-19 hi-way summer, 10-13 city winter--bit better hi way winter all empty not towing. With 5er (below) attached: 8.5-9.5, snowmobiler trailer attached: 10.5. Interstate speed = 70, otherwise 55-60.

From what I read the 2017s are just a bit lighter with aluminum so it should yield better mileage if you keep your foot off the throttle. My Powerstroke shares the same turbo and emissions as the newer ones so they are somewhat apples to apples. The 2017s do make a bit more torque but have the same horsepower. The 2017s are a little taller which could have a small impact.

I find just the opposite. The newer the truck and the more advanced the emissions hardware is, the crappier the fuel mileage becomes.

I know it's a 'pie in the sky' statement but my venerable 97 F350 7.3 returns 21 empty and 17-18 loaded everyday, winter and summer though it rarely gets driven in the winter.

New, Tier 4 final trucks don't get close to that mileage.

My 2015 gets 17 mpg when traveling with about 75% highway and 25% city. When commuting in 50% city and highway it gets around 15 mpg. I get around 12 mpg towing my fifth wheel plus or minus 1 depending on wind. I'm sure the 2017s get just a bit better.

Mine is a 2012. But it is the 6.7. My daily driving is about 25% hwy and 75% city and the mileage runs between 15.1 and 15.5. Unloaded highway running 65-70 the mileage will run 19-21 depending on wind, terrain, and traffic and if I keep my foot out of it and maintain a steady speed. Don't know if the newer ones do any better or not.

Tugging the 35' high profile 5er along at 65-70 the mileage runs 9.5-10.5 depending on same conditions above.

I don't have a ford, but the modern diesels all get similar mileage. Town unloaded they get 12-15. Highway 17-21. Loaded with a small trailer like mine I get 13 on trips. I don't drive slow.
Those numbers depend alot on driving, tire size, gearing choice, summer/winter diesel.