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.

Maybach from Jay-Z and Kanye West video up for auction

Just because Daimler shut down Maybach in November doesn't mean that the marque won't still fetch top dollar on the open market. But, if buyers want something with a little more flair and a little less Grey Poupon, they can head to the Phillips de Pury & Co. auction in New York to pick one up that was used in the Jay-Z and Kanye West video for the song “Otis.” The Maybach 57 with a pedigree is expected to go for about $125,000, a third of what one costs new.

Porsche 918 RSR concept (2011) first official pictures

Porsche opens orders books for 918 Spyder (2011)Porsche 918 Supercar hybrid to be builtCAR interviews Porsche's R&D boss Wolfgang Durheimer (2011) Two of 2010’s most exciting cars were the Porsche 911 GT3 R Hybrid racer, and the Porsche 918 Spyder concept car that previewed Porsche’s hybrid successor to the Carrera GT supercar. What do you get when you mix the two together? Answer: the new Porsche 918 RSR, just unveiled at the 2011 Detroit motor show.