[M_a_t_t]

Originally Posted by cRiPpLe_rOoStEr

Not sure how easy it would be to swap the differential of the Sienna as it is for a traditional RWD rig, but it's still worth to also keep an eye for the low-hanging fruit. And since it's smaller, most likely more aerodynamic, the Sienna seems to be a good platform for that project anyway.

You might be able to mod the drivetrain a little easier, but you will be starting so much lower with an e350 (rated 12/16MPG) than the sienna.

If you want a traditional rwd van I might suggest an Astro. Seats 7 or 8 (captain chair vs benches). 5500lb towing capacity. Can swap in a manual transmission from a truck. Re-gearing is easier. I averaged ~18mpg in town with my 95 in stock setup (auto trans).