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General Motors reveals two-wheel PUMA electric-vehicle prototype

It’s based on the same driving principles as a skateboard. It looks like a phone booth, or perhaps a baby stroller. But despite the unconventional nature of this vehicle, General Motors says a two-seat, two-wheel ride called PUMA could be a solution to loosen congestion in crowded urban areas.

Mini brand to get turbo three-cylinder engine

BMW confirmed the Mini brand will also get BMW's new, turbo three-cylinder engine in upcoming models to be named later as part of a new family of engines for both brands that also includes an all-new four-cylinder. The company won't say which future models get the new three-cylinder other than the already announced BMW i8 plug-in hybrid. It arrives in the spring of 2014.

GM continues work on fuel-saving engine technology

Sometime in the next decade, you might be able to enjoy some of the benefits of a diesel without driving one. A technology called HCCI improves fuel economy 15 percent and releases fewer emissions by using a combustion process similar to what is used in diesel powerplants. General Motors continues work on the project, which could be applied across a range of engine sizes and used with other advanced fuel-saving technologies to help the company comply with the proposed new mileage and emissions targets announced Tuesday by President Barack Obama.