6. Mazda3 Skyactiv $20,020
Mazda went all in on fuel efficiency with its Skyactiv technology. Emphasizing light-weight components and more efficient transmissions and engines, the Skyactiv Mazda3 is able to hit 40 mpg when properly equipped. Pay the $20,020 pricetag for the Skyactiv-G 2.0L engine as well as the six-speed automatic, and you’ll see an improvement of up to 12 mpg on the highway over the 2.5L engine option in the Mazda3, or an improvement of 7 mpg over the non Skyactiv 2.0L engine. Check out our review of the Skyactiv Mazda3.