SkyActiv

SkyActiv is a series of technologies developed by Mazda which increases fuel efficiency and engine output. Among some of its technologies include a new gasoline engine that uses diesel-like compression ratios to improve fuel economy, a new automated transmission which combines a tradition automatic's torque converter with a dual-clutch, and a lightweight body design.^[1]^[2]

Skyactiv-G is a 2-liter engine displacement, 4-cylinder, gasoline engine which is according to Mazda more fuel effective than their earlier comparable engines. By using this engine in the 2012 version of the Mazda3, they claim that with an automatic transmission, they improved fuel economy from 23 mpg to 28 mpg in town, and from 33 mpg to 40 mpg on the highway compared to the 2011 model.^[3]

References

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^ [2]
^ "Turning Up the Pressure to Keep Gas in the Game". New York Times. November 11, 2011. http://www.nytimes.com/2011/11/13/automobiles/turning-up-the-pressure-to-keep-gas-in-the-game.html?_r=1&ref=science. Retrieved 2011-11-14. "But the most daring advance is the 2-liter Skyactiv-G gasoline engine. That 4-cylinder power plant made its North American debut in the 2012 Mazda 3, where it raised the fuel economy rating to 28 m.p.g in town and 40 on the highway with an automatic transmission, from 24/33 for the 2011 model sedan with a 2-liter engine. ..."