I tend to get a lot less them most. I think at least one of my trucks would get as good as some people claim. Maybe it's not me or my trucks though.

 

To be very honest I was shocked and checked at each fill to confirm the mileage. This drive is fairly flat too.

 

I know with my 02 5.4 with about 45,000 miles on it ,I was able to get up to 14.5 mpg in the midwest with non-ethanol gas back in 06 and traveling between 60 and 80 mph.But now with the ethanol and 95,000 miles I am lucky to get 10 mpg.

 

I picked up my new Ford F250 6.7 diesel, supercab, 2wd, srw, 3.31 rear axle, configured for maximum fuel economy (6600# curb weight) Driving home, a 75 mile trip, 65 miles cruising at 65mph (1500rpm) and 10 miles city driving using very conservative driving techniques, the multifunction gauge showed 22.1 mpg. I didnt do a hand calculation because of the low mileage but assume the multifunction readout is very accurate.

 

I posted my observations on a couple other earlier threads, but figured as I put on more miles (I'm over 600 miles now) my results mean more.

My bride and I just put on over 100 miles today driving the roads on Kodiak since it was a gorgeous day. Road is very windy at times, 75% was paved, and a lot of elevation changes going through passes. So, spent some time with engine at 2000-2500 rpm. Speeds ranged from 25 - 60mph. Spent a little time in the sand on the beach with the diff locked. Even so, mileage increased from 14.5 when I started to 15.1 when I got home. Last time I checked, the meter was about 4 tenths high.

Kinda curious what this dude would do on a highway at a constant speed.

2011 F250 CC, SB, 6.2L, 3.73

 

I just returned from a trip that was 3658 miles. My MPG average for the entire trip was 12.13. Mileage on the truck at the start of the trip was 518.

I'm a conservative driver. Usually keep it about 60 mph. Occasionally 65. On a long hill, I back off to 55 on the up side and let it go on the down. I also ease up when I have a strong head wind.

The truck is a 2011, 6.7, Crew Cab, Dually, 2 Wheel drive, 3.73 Diff, 13000 GVWR.

Load on the trip included an 11 1/2 foot slide-in camper. Truck and camper registered 12,860 lbs on a certified scale. I probably added another 100 lbs of food and clothing before I left.

(curb weight, including a full tank of fuel, was 7,720 lbs)

 

You must be smoking what you went to pick up in FL dude.

 

They claim a 10% loss in economy with ethanol.So I guess 1.5-2 mpg is not out of the question with the ethanol vs non ethanol.But you would think after building F250's 40 yrs or so that they would have had the "BEST" combination of axle ratios,transmissions,and engines for the various situations.OEM's still cannot build a limited slip as good as the aftermarket yet.My ford limited slip in my 94 F250 hardly worked and the fluid was changed a few times with the proper additives.

 

2011 6.7 Crew Cab, SB F250, 15.7 mixed
2011 6.2 Super Cab, SB F250, 11.5 mixed


The gasser only has 400 miles on it, the diesel is up to 5k right now, mileage is getting better than when new. Very happy with both motors.

 

2011 Crew Cab 4X4 6.7 diesel

First 300 miles 90% highway, 18 MPG U.S. (converted from litres/100 km, 12.9)

Very pleased with mileage.

 

Just looking through the answers, looks like the 6.2 gets about the same mileage as the 5.4 2 valve, maybe a little better. Course though, the 6.2 produces more torque and horsepower than my 2000 5.4.

Looks like the 6.7 is doing pretty good compared to some of the other brands. Although, 10-12 years ago, that was about the average milage for the diesels. With the bragging about fuel economy, one might have thought that the new crop of oil burners would be in the mid to high 20s, at least on the highway. Again, the torque and horsepower is higher than the old 7.3, or 6.0.

 

Well i looking around and talking to my sales guy, hoping the 6.2L will get 16 in town and 21 highway (empty of course LoL)

this compared to my 2002 V10 6.8L 8 in town and 13 highway

much much better!

 

Thats a little high IMO...

 

My 2011 Scorpion 6.7 get 15-16 around town and 22-23 on the freeway. Last weekend towing my 30' toy hauler I got 15 while towing at 55mph and 12 at 65mph.

 

The first 400 miles of highway driving with my F350 dually, speed varied from 55 to 75, resulted in a average of 17.3. I've been driving around town for about 300 miles and the average is down to 16. Will start towing next week. heading to AZ.