I get 18-19 on the highway with my '06 Expy. I had an '05 Explorer with the 4.6 in it and I got between 18-20 on the highway. The second gen Expeditions ride a lot better than the second gen Explorers. If you were talking about '08 -'10 Explorers, they ride much better than the '02-07's. In the end, get what works for you and your family the best. But I have not looked back since I traded the Explorer in for the Expy.