Aviator 
2008 Toyota Yaris Sedan 4dr Sedan (1.5L 4cyl 4A)
Absolutely the BEST MPG!
 In 75 to 85 mph on the freeway and a/c on I consistently get 41 to 43+ mpg!! And this is an auto transmission. The very best was two weeks ago in Yellowstone National park. We fueled up in Jackson Hole WY and drove to Moran junction and entered the park and later that night arrived to West Yellowstone Montana. Our speed was between 30 and 50 mph and our mileage was 60.11 mpg!! No a/c, lower speed obviously contributed to the mpg. Three other vehicles in our party and we double checked all of the figures. Before you doubt, please know that I am a pilot and do know how to calculate mpg and a whole lot more. If you want reliability and mpg, go buy the car. You will not regret!