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For new CAFE rules, automakers place high-stakes tech bets

Game-changing 2015 fuel economy rules are forcing vehicle development teams to make high-stakes bets on expensive technologies--bets that will separate the winners from the also-rans. Not only do federal rules target a 2015 fleet average of 35.5 mpg, up from the current 27.5 mpg for cars and 23.1 mpg for light trucks; they force automakers to bet on different technology packages for each vehicle segment. Companies that do best at mixing technologies while keeping down costs will have an advantage when buyers wince at higher stickers.

Shelby GT500 durability car to be auctioned off at Barrett-Jackson

Carroll Shelby will have his name all over the Barrett-Jackson Collector Car Auction in Arizona this weekend. In addition to the anniversary edition Shelby Cobra being displayed for the first time, a 2013 Ford Shelby GT500 durability car will be auctioned. The sale will raise money for the Juvenile Diabetes Research Foundation.

2013 Porsche 911 Carrera 4 & 4S, Coupe & Convertible first photos leak

The first photos of the 2013 4WD Porsche 911 Carrera 4 & 4S – coupe and cabriolet – have leaked out ahead of a Paris 2012 debut. Update: The new Porsche 911 Carrera 4 has now been officially revealed. The latest version of the Porsche 911 (Porsche 911) arrived at the 2011 Frankfurt Motor Show, and Porsche are planning to reveal the four wheel drive versions – the Porsche 911 $ and 4S, Coupe and cabriolet – at the 2012 Paris Motor Show.