Contenderv07
Six Pointer
I though the fuelly website would be more helpful but here you go:
I have a 2014 Tacoma DCSB TRD OR and I got 19.89 MPG on the last tank not hauling much of anything on mostly country roads and driving around town; so not really a lot of interstate driving but not much in the way of stop and go either. It's never going to be more economical than my Honda Civic but I'm awfully happy to have a 4x4 truck that can hover around 20 MPG. Along the lines of what Contenderv07 wrote above, you might also want to look into the new Ram 1500 with the turbo diesel.
Forgot all about the 1500 diesel. I think the Nissan Titan is getting the same Diesel engine too