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Diesel joins Porsche Panamera lineup

Porsche has put forward some eye-catching fuel-economy figures for the Panamera diesel--although we may never see the car in the United States. Set to go on sale across Europe in August, the four-door is claimed to return a combined city/highway driving fuel economy of 36.2 mpg in standard guise under European testing procedures. When fitted with optional low-rolling-resistance tires, the fuel economy climbs to 37.3 mpg on the European test--a figure that gives the Panamera diesel a theoretical range of 800 miles on its 21-gallon fuel tank.

1931 Marmon Sixteen convertible is the top seller at Hershey auction

A 1931 Marmon Sixteen Convertible Coupe, one of only 400 Marmon Sixteens built, sold for $517,000 at RM Auction's Vintage Motor Cars of Hershey event on Oct. 8. The Marmon Sixteen was the auction's top-selling car.

Why the Stingray's $52K sticker should come with an asterisk

General Motors resisted the urge to jack up the price on the 2014 Corvette Stingray, despite major enhancements on the seventh-generation sports car. The $51,995* sticker for the coupe, which is expected to hit showrooms by September, is just 1,400 bucks more than the current model, even with its more powerful engine, better fuel economy and vastly improved interior. Why the asterisk?