EM member niky was kind enough to gather some readings for us recently while reviewing/testing a new Mitsubishi Mirage:
This car would give my "stock" 1998 Pontiac Firefly (Geo Metro) a run for its money, getting slightly worse mileage below 80 km/h, but better mileage above.
These results are from a car not yet broken in (2k km/1200 mi. on the clock), with the tires set at spec in the low-30 PSI range, and the A/C running. (My Firefly doesn't even
have A/C!) On the other hand, balance that against the fact the numbers came from the factory FE gauge -- they're often optimistic.
Still, the numbers support our guesstimate that this car will have
the best (if not, then 2nd best) non-hybrid mileage when it arrives in Canada & the U.S. this fall.
More detailed info about the car and the test, here:
Speed vs. mileage/fuel economy chart - Mirage 1.2L 5-spd