I have an '07 EB EL with 4X4. I have 1850 miles on it so far. Just got back from a 1200 mile trip (all highway miles) and averaged 18.6 on the highway. My in town trips are running 15.2 mpg. All miles driven so far have been in 2WD mode.

I had an '03 and an '05 Expedition before this one, neither of those would come close to my '07 EL in mpgs. With all haveing the same engine, I'm crediting the increased milage to the 6 speed transmission and maybe a little more sensible driving habits.