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If you think that companies like General Motors only think about fuel economy when new CAFE standards are making news, you'd be wrong.
If you think that companies like General Motors only think about fuel economy when new CAFE standards are making news, you'd be wrong. GM and other manufacturers are always looking for new technologies to more efficiently power the next generation of transportation.
Photo Gallery: General Motors and HCCI Engines - Fuel Efficient News, Car Features and Reviews - Automobile Magazine