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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.

F-150 just the start of Ford's aluminum plans

Not only have we been told that the 2015 Ford F-150 is tougher, more durable and up to 700 pounds lighter than the current truck, Ford COO Mark Fields said it's also "CAFE-positive." That means, for the first time in the history of corporate average fuel economy standards, the F-150 would be a positive contributor on Ford's CAFE balance sheet instead of being a vehicle it needs to counterbalance with frugal offerings.
Fields' comments made at the Detroit Auto Show were among quotes from other Ford execs that confirmed the carmaker will be using aluminum for more of its vehicles. CEO Alan Mulally said it would "proliferate across our lineup," with speculation being that we'll see it applied to crossover and sport utility models first, since they'll benefit the most. Even gaining the massive scale of using aluminum on the world's best selling vehicle for its first effort - on average, the company sells two times as many F-150s in a single day as Land Rover sells of its aluminum Range Rover in a month - Ford will be looking to further spread the cost of its five-year development investment in aluminum technology. And that should mean better handling and fuel economy for those of us who don't need to wear hardhats at the office.

Tier 1 suppliers call GM the worst OEM to work with

Among automakers with a big US presence, General Motors is the worst to work for, according to a new survey from Tier 1 automotive suppliers, conducted by Planning Perspectives, Inc.
The Detroit-based manufacturer, which has been under fire following the ignition switch recall and its accompanying scandal, finished behind six other automakers with big US manufacturing operations. Suppliers had issues with trust and communications, as well as intellectual property protection. GM was also the least likely to allow suppliers to raise their prices in the face of unexpected increases in material cost, all of which contributed to 55 percent of suppliers saying their relationship with GM was "poor to very poor."
GM's cross-town competitors didn't fare much better. Chrysler finished in fifth place, ahead of GM and behind Dearborn-based Ford, which was passed for third place this year by Nissan. Toyota took the top marks, while Honda captured second place.