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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.

Aluminum lightweighting does, in fact, save fuel

When the best-selling US truck sheds the equivalent weight of three football fullbacks by shifting to aluminum, folks start paying attention. Oak Ridge National Laboratory took a closer look at whether the reduced fuel consumption from a lighter aluminum body makes up for the fact that producing aluminum is far more energy intensive than steel. And the results of the study are pretty encouraging. In a nutshell, the energy needed to produce a vehicle's raw materials accounts for about 10 percent of a typical vehicle's carbon footprint during its total lifecycle, and that number is up from six percent because of advancements in fuel economy (fuel use is down to about 68 percent of total emissions from about 75 percent). Still, even with that higher material-extraction share, the fuel-efficiency gains from aluminum compared to steel will offset the additional vehicle-extraction energy in just 12,000 miles of driving, according to the study. That means that, from an environmental standpoint, aluminum vehicles are playing with the house's money after just one year on the road. Aluminum-sheet construction got topical real quickly earlier this year when Ford said the 2015 F-150 pickup truck would go to a 93-percent aluminum body construction. In addition to aluminum being less corrosive than steel, that change caused the F-150 to shed 700 pounds from its curb weight. And it looks like the Explorer and Expedition SUVs may go on an aluminum diet next. Take a look at SAE International's synopsis of the Oak Ridge Lab's study below. Life Cycle Energy and Environmental Assessment of Aluminum-Intensive Vehicle Design Advanced lightweight materials are increasingly being incorporated into new vehicle designs by automakers to enhance performance and assist in complying with increasing requirements of corporate average fuel economy standards. To assess the primary energy and carbon dioxide equivalent (CO2e) implications of vehicle designs utilizing these materials, this study examines the potential life cycle impacts of two lightweight material alternative vehicle designs, i.e., steel and aluminum of a typical passenger vehicle operated today in North America. LCA for three common alternative lightweight vehicle designs are evaluated: current production ("Baseline"), an advanced high strength steel and aluminum design ("LWSV"), and an aluminum-intensive design (AIV).

Texas plumber shocked his old Ford F-250 is now in terrorists' hands [w/video]

Do you ever wonder what the a owner is doing with your vehicle after you trade it in? Mark Oberholtzer of Mark-1 Plumbing in Texas City, TX, has no need to imagine, but it's probably his worst nightmare. That's because an image of his old Ford F-250 is now on Twitter as a gun platform in the Syrian Civil War. While the image only appeared recently, Oberholtzer traded the truck in last November. Somehow since then the F-250 made its way from Texas to Syria. According to a report from television station WHOU, the dealer that took the trade said the pickup immediately went to auction. Unfortunately, along the whole route no one ever took Mark-1 Plumbing's name and phone number off the door. So when the image went up on Twitter, everyone knew whom the Ford previously belonged to. The plumbing company makes it abundantly clear that this whole bizarre situation is simply a coincidence, and it has absolutely no ties to the conflict in Syria. However, that isn't preventing people from phoning the business with angry calls and threats. Things are so bad that Oberholtzer keeps the phones unplugged for relief. Scroll down to watch a video of the guy's flabbergasted reaction to finding out what his F-250 is doing now. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.