the past 2 tanks of gas Ive been able to average 21.6mpg, all city driving.
not bad for an Xterra with the 3.3L v6 with an EPA of 15 city
no mods yet except a 2" drop all around. mostly accomplished with hypermiling techniques.
but planned mods should net me even more (hopefully in order of installation:
partial grill block (full upper and part lower intake)
front belly pan (from valance to front wheels)
headlight covers (home made from 1/8 or less Lexan)
E-fan
wheel covers
later mods (if I keep the Xterra longer than 6 months)
full belly pan
partial side skirts
2:89 rear end (current is 4:6)