General Motors became the first automotive company to sell over 1 million vehicles in its home market in a single year that achieves an EPA-estimated 30 mpg or better on the highway. The news was announced in a press release this week.

"Our investments in advanced powertrains are clearly paying off, and our smaller vehicles are resonating with customers," said Mark Reuss, president of GM North America. "In 2013, we'll introduce new diesel, eAssist and plug-in vehicles in the United States and expand the availability of turbocharged four-cylinder engines.

Thirteen GM vehicles have at least one high-volume model which achieves 30 mpg or better on the highway according to GM.

Four Chevrolet vehicles, the Spark, Cruze, Sonic, and Volt, all appear on the list and achieve 30 mph or better in EPA combined city and highway driving. Around 40 percent of GM's vehicles by sales volume are powered by fuel-efficient four cylinder engines.

Click here to see the entire list on GM's website.

Buick and Chevy delivers over 50,000 vehicles that use advanced lithium-ion battery technology according to GM.

Buick is set to launch the 33-mpg Buick Encore in 2013, Cadillac will release the ELR extended-range electric vehicle, and Chevy is set to release an all-new Impala.

"This will give us the most technologically diverse range of fuel-efficient cars and crossovers in the industry."

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