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Autoweek's 2014 Best of the Best Finalists -- sneak peek

Every year, as hundreds of new cars and trucks pass through our fleet for evaluation, we are always on the lookout for those dazzling few deserving more careful scrutiny for our top honors, the Autoweek Best of the Best. It's down to three cars and three trucks that our regular readers quickly will recognize in the video above, designed to whet your appetite as we get further along in the judging. We'll be bringing you full details on our Best of the Best/Car and Best of the Best/Truck finalists in the coming days, along with updates as we get closer to announcing our winners in the December 23 issue of Autoweek.

MPG or performance: It's a trade with turbos

Some automakers say turbochargers offer high fuel economy and quick acceleration, the best of both worlds. Well, yes and no. Turbocharged vehicles allow automakers to keep power output high while they downsize engines for better fuel economy.

GM says natural-gas Chevrolet Impala on the way

General Motors said it will sell a version of the Chevrolet Impala sedan with the ability to switch between gasoline and natural gas, part of the automaker's plan for taking advantage of a U.S. drilling boom that has made natural gas a more viable fuel for cars. The dual-fuel Impala, to be announced today by CEO Dan Akerson at a conference here, will have one engine and two fuel tanks -- one for gasoline and one for compressed natural gas.