I finally got to take a road trip with my truck and I was pleasently suprised at the fuel mileage. When I got to my destination I thought I had a faulty fuel guage because it was showing a decent amount of fuel still in the tank. What I did was filled the tank at the begining of the trip right at the interstate. Once rolling I put the c/c at 70 and drove, only stopping 1 time for a bite to eat. Once I got to where I was going, drove a bit around town and filled up. I hand calculated the mileage: 563 miles divided by 28.8 gallons = 19.54 miles per gallon. I was floored because for the last 20 years, if I got 15mpg hwy out of any 4x4 truck I had I was happy. The return trip turned out to be 20. According to the computer, it says that I could have gone 720 miles on a tank. I am hoping that this is the norm. The truck just tuned over 6800 miles on the trip. Sorry for the long story but had to tell somebody.
__________________

 

That's good to hear! I'm getting my new truck in a week or 2 and am excited about the mileage. I did the math and came up with about the same miles per tank. Don't know what setup you have, but I'm taking delivery on a 2011 FX4 Crewcab 5.0L.

 

I have a 2010 screw w/ 5.4 and 3.55 rear. MBRP SI/DO exhaust and MaxEnergy tuner. Congrats on the new truck.

 

what motor do you have? These new trucks are easily avg 20 on highway. I have the 5.0 and loving the 18.5-20 avg. I came from a F250 were i was getting 9-11

 

2010 5.4...