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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.

Ford recalling nearly 700k Escape CUVs, C-Max hybrids over two separate safety issues

Poor Escape. Ever since its launch in 2012, Ford's small CUV has been the subject of many, many, many recalls. And today, The Detroit News is reporting that Ford is adding two more recalls to the 2013-14 model year Escape's permanent record, one of them also involves the C-Max hybrid hatchback.
The first recall, covering 692,500 Escape and C-Max vehicles, is due to a software glitch that could cause the airbags - specifically, the safety canopy - to not deploy in a timely fashion during rollover crashes. According to the News, Ford says no crashes or injuries have been reported in relation to this problem.
The second recall, covering 692,700 Escapes, is related to the door handles. The News reports that the exterior door handles could open while the vehicle is in motion, and could also fail to latch properly. Once again, no crashes or injuries have occurred because of this. The National Highway Safety Traffic Administration has not issued an official notice on either recall as of this writing.

GM readying aluminum-body fullsize pickups

Ford's extensive use of aluminum in its 2015 F-150 is a big deal. A really big deal. Big enough, in fact, that General Motors is reportedly changing its fullsize pickup strategy. According to The Wall Street Journal, The General has locked in partnerships with Alcoa Inc. and Novelis Inc. - companies that will supply aluminum for the next-generation Chevrolet Silverado and GMC Sierra trucks.
"Ford's introduction of the 2015 F-150 pickup truck was a game changer, and it's the first, not the last, conversion of this type," Novelis spokesperson Charles Belbin told the Journal. The switch to aluminum has allowed Ford to shave roughly 700 pounds off its fullsize truck's curb weight. And while official mileage ratings have not been announced, the weight loss should go a long way for improving efficiency, especially when combined other efficiency-minded improvements including better aerodynamics and new, turbocharged V6 engines.
Of course, aluminum-bodied cars are nothing new. But extensive use of aluminum in a major, best-selling product like the Ford F-150 is expected to kick off widespread use of this weight-saving material as availability rises and cost decreases. The WSJ reports that GM had originally explored the idea of moving to aluminum pickups back in 2008, but abandoned the idea due to cost concerns amid economic woes.