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AW gets a long-term natural-gas Honda Civic

For all those wanting to save the universe, may we introduce the latest member of the AutoWeek green car fleet--a Honda Civic GX. The GX is a regular Civic in every respect but one--its 1.8-liter four-cylinder internal-combustion engine is powered solely by compressed natural gas. The main benefit of this is that it achieves as close to zero emissions as you can get in a mass-produced passenger car.

Hyundai, Kia retract mileage claims

Hyundai and Kia overstated the estimated fuel economy on more than 900,000 U.S. vehicles sold over the past two years and will compensate owners for the faulty claims, a newspaper reported. In addition, the South Korean partners will lower the fuel-economy estimates on most of their 2012 and 2013 models, the Detroit News said.

Next Jaguar XJ takes styling cues from the XF

Jaguar is putting the finishing touches on its heavily revised 2011 XJ sedan, remaking its flagship sedan in the mold of the XF sedan. Based on a re-engineered version of today's all-aluminum XJ chassis introduced with the sedately styled 2004 model, the next XJ will be significantly different in appearance, drawing its coupelike-sedan inspiration from the Ian Callum-penned XF. "People know that something is coming, but they're going to be very surprised," says one source involved in the project code-named X351.