4 door hatchback, seats 4 adults, limited luggage capacity, the 5-speed manual is geared way too low: at 65mph the engine spins ~3,400RPM
http://en.wikipedia.org/wiki/Scion_xA
The EPA ratings when I bought it were 32/38, and the adjusted "new" estimates are 27/34/30.
Current Mods:
I had the available TRO "cold air intake" installed with it's K&N air filter.
Planned Mods:
Mostly aero -- the front grill is too open (plastic grill w/ open hexagons), and under the floor of the hatch, there are lots of lousy things: the rear bumper fascia hangs down and along with a part of the chassis metal, forms a "sail"; certainly causing drag.
I would love to replace the side mirrors with video cameras and small screens!