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Chevrolet is bringing CNG power to the Silverado HD

Chevrolet is taking CNG-powered vehicles seriously, with so many of their trucks being used in commercial fleets, so it was perhaps no surprise that we'd see a version of the 2015 Silverado HD that can be run either on gasoline or compressed natural gas before long. Chevrolet brought the 2015 Silverado 2500 HD CNG to the Chicago Auto Show, to let prospective buyers as well as the media to learn about at the savings that could be realized with this environmentally friendly setup. The HD CNG truck will offer bi-fuel capability coupled with its 6.0-liter V8 engine that's been modified with hardened valves and valve seats to run on compressed natural gas.

Microsoft increases stake in auto industry

Having reshaped a big piece of the world's economy around its Windows software, Microsoft Corp. now wants to do the same thing in the car business. What the Seattle giant sees there says as much about the future of cars as it does about itself.

Sky takes Mazda powertrains to the next level

Mazda's next-generation of powertrains, called Sky, will feature a variety of new technologies that company engineers say improve fuel efficiency by 20 percent. The Sky engines--Sky-G for the gasoline version, Sky-D for diesel--coupled with a Sky-Drive automatic transmission or a six-speed manual, were offered for test drives during a technology day in Berlin. The Sky-G engine we drove was a 2.0-liter inline-four that made 160 hp and 155 lb-ft of torque.