for my Fit, avg. 5.7L/100kms, or 42.3miles/us Gal.
On highway, cruising around 95kms/hr (63miles/hr), typically with Chevron/Texaco 87 octane rating, with between 20~80% A/C on (when it rains in PNW, you have to keep your A/C on)...tires on 32psi (cold, all 4). Load typically 1 occupant (myself, weighs 176lbs) + 200lbs load (my gear), or occasionally an additional passenger weigh in @ 170lbs.
City driving ususally less for esp. when the A/C is on (rain) and lots of short trips, I fare between 6.8~7.8L/100kms typical.
Q.