Mileage of course will vary greatly on conditions. If you drive the CT hard enough, you can see mileage creep down into the 20s, but we predict most people will achieve averages close to the EPA's 42 mpg city, 41 highway ratings. Up into the mountains from Palm Springs and back down again, we averaged about 24 miles per gallon—a true worst-case-scenario reading; but then over about 15 miles of mostly level boulevard driving around Palm Springs, gentle on the throttle, we saw a 49-mpg average. Another test car had been averaging 42 mpg over a longer test route.
The CT also, like the Prius, features an exhaust-gas recovery system that helps lower emissions and improve fuel economy—and helps reduce the amount the gasoline engine runs in short-trip use.