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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.

Brit-Based Supercar Maker Unveils Third New Model

THIRD time’s going to be the charm for McLaren, as the Woking-based firm has unveiled its third supercar ahead of a public debut at the forthcoming Geneva Motor Show. Hot on the heels of the P1 hypercar, the new 650S slots between the firm’s flagship motor and already established 12C. With bold claims of race car-like performance while retaining the luxury and refinement of its premium supercar rivals, McLaren has revealed that the 650S can sprint to 124mph from rest – the industry standard 200kph – in a blistering 8.4 seconds.

Fisker Karma plug-in hybrid recalled over possible battery-cooling system defect

Fisker Automotive is recalling 239 Karma hybrid cars to fix a defect in the vehicle's high-voltage battery. The recall notice, posted today on the National Highway Traffic Safety Administration's Web site, says the campaign targets all 2012 Fisker Karma models manufactured between July 1 and Nov. 3 of this year.