Purely for data point sake...definitely a flyer
30" 265/70 16s and maybe 120# in the back,
45mi, 2-way (90mi total, N/S), flat-ground run
@65mph on interstate
@5500ft
on 88 non-eth
in 95deg ambient
gets repeatable 18.5mpg.
Calculations were made using the stock odo, phone gps, and refuel amount...