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The California Air Resources Board has given a green rating to the 2011 Chevrolet Volt, the grade atop the page being ULEV (Ultra Low Emissions Vehicle). That's below the SULEV and PZEV ratings of cars you might not expect to beat the Volt, such as the four-cylinder Honda Accord and Volkswagen ...
Click image for gallery of the Nissan X-TrailNissan has announced that a clean diesel engine will be offered on its Japan-market X-Trail SUV. Based on the M9R engine co-developed with Renault (it's marketed as the 2.0dCi in the French automaker's vehicles), the Nissan version will use new catalysts ...