2006 Prius. 1021 miles on the odometer since we bought it new. Traveled to PA. Started with a full tank, filled up after driving 136 miles, using cruise control where feasible and with the air on. Took 2.2 gallons. More interior space than my '99 Camry. Wife tells me to slow down when I start cruising at 80. I see drivers of SUV's and similar trucks/cars trying to keep their speed down and even to squeeze a few miles more out of tankful so they can postpone the $50 to $60 fill up a few days longer and I laugh.
Sorry....I don't really laugh....I smile with deepest sympathy.