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Which is more fuel efficient, driving with a pickup's tailgate up or down?

Thanks to the smoke wand in the wind tunnel, you can actually see the difference in our video.
Should you drive with your pickup truck's tailgate up or down? It's an age-old controversy that's divided drivers for decades. Traditionalists will swear you should leave the tailgate down. Makes sense, right? It would seem to let the air flow more cleanly over the body and through the bed. But there's also a school of thought that argues trucks are designed to look and operate in a specific manner, and modern design techniques can help channel the airflow properly. So don't mess with all of that: Leave the tailgate up.

And the Top Gear UK Cars of the Year for 2013 are...

Those loony Brits at Top Gear have named their Car of the Year, and if you're thinking it's the McLaren P1, Jaguar F-Type, Land Rover Range Rover Sport or Rolls-Royce Wraith, we're sorry to inform you that none of those Anglo automobiles earned the crown. In fact, the winner of Top Gear's most prestigious award is quite the surprise.
Of course, those cars weren't without their own awards. The P1 was the top hypercar (sorry, Porsche 918 and Ferrari LaFerrari), while the F-Type netted best convertible and the Range Rover Sport was voted SUV of the Year. Other honorable mentions included the Mercedes-Benz SLS AMG Black and S-Class, the Porsche 911 GT3, the BMW i3 and the Ferrari 458 Speciale. The winner, though, wasn't even a high-dollar supercar. It was the Ford Fiesta ST.
Yes, the Fiesta ST beat out some off-the-wall cars like the revolutionary Volkswagen XL1 and the bonkers Peugeot 208 T16 Pikes Peak, not to mention all the cars we listed above, to take the title of Top Gear Car of the Year. And if you've driven one, you'll completely understand why.

Ford spotted testing new Focus RS at the Nurburgring

Ford is expected to be launching a revised version of the Focus ST soon, but the latest snapshots from our spy photographers at the Nürburgring suggest that the Blue Oval is already working on an even more potent example: the new Focus RS.
Though the partially disguised test mule is wearing an ST badge (along with a Dewey sticker that makes us wonder what adventures Huey and Louie are up to and what manner of duck-tail rear spoiler they may be wearing), there are several tell-tale signs that something else is afoot here. There's a larger front air dam, bigger brake calipers, dual exhaust tips (instead of the central exhaust on the ST) and a reshaped wing protruding from the trailing edge of the roof.
That may all be well and fine, but what's under the hood? We don't know yet for sure, but word has it that Ford is preparing to port over the 2.3-liter turbo four offered in the new Mustang, where it packs 305 horsepower and almost as much torque - potentially retuned to produce even more for the top-of-the-line Focus, which could channel it all to the front wheels like the last model or pack an all-wheel drive system. The Global C platform on which the Focus is based does, after all, also underpin AWD models like the Ford Escape and Lincoln MKC.