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Porsche Panamera S E-Hybrid does 62mpg in the hands of motoring journalists

The Porsche Panamera S E-Hybrid – a Panamera with a plug-in hybrid powertrain – arrives last month, along with a 2013 facelift for the Panamera range , complete with claims from Porsche that it could do 91mpg. That was never going to happen in the real world, but Porsche has followed up its official economy figures with a degree of proof that the Panamera E-Hybrid can actually achieve very impressive economy numbers in the real world, and in the hands of motoring journalists – a group not renowned for their light touch on the throttle. At a press event in Hockenheim, Porsche let car journalists loose on the Panamera E-Hybrid for a total of 42 drives over a total distance of 750 miles and returned an average of 62mpg.

BMW debuts social-media campaign for concepts

BMW launched its next marketing campaign for the BMW i3 and i8, aimed at the tech consumer. The campaign runs on location-service Foursquare, social-news round-up site Mashable and iAd, Apple's mobile-advertising network. The iAd campaign will run in Europe on iPhones, iPods and iPads.

General Motors fires back at Volkswagen

General Motors issued a terse response this week to published comments by Volkswagen CEO Martin Winterkorn, who suggested to the German press that Opel could be sold to a Chinese competitor. Detroit-based GM called Winterkorn's comments “regrettable” and accused him of “fanning speculation.” Opel was nearly sold to Magna and Russian investors in the wake of GM's 2009 bankruptcy. But then-CEO Ed Whitacre and the corporate board reversed that decision, igniting controversy from German political and labor leaders who have long chafed under American oversight.