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Watch this week's Top Gear America used-car challenge

Top Gear America is back for the penultimate episode of the first season. Used car challenges were some of the highlights of the original UK edition. In our exclusive clip, Tom Ford, Antron Brown and William Fichtner run their $7,000 sports cars in a drag race. As expected, the trio chose very different cars for the challenge. Watch the video to see if a Subaru WRX's all-wheel drive can overcome a power deficit to beat a Ford Mustang and a Chevy Corvette. Brown and Fichtner also spend some time relaxing with an old Jeep Wagoneer. Like them, we're really hoping Jeep will bring back the Wagoneer nameplate. Brown also drives a Maserati Levante, proving that not all family cars need be boring. This week's guest star is actor, rapper and former host of Pimp My Ride, Xzibit. Top Gear America airs Sundays at 8 p.m. Eastern on BBC America. Related Video: Celebrities TV/Movies Chevrolet Ford Subaru Top Gear exclusive top gear america

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).

Ford's BlueCruise gains hands-free lane changes and more in update

Ford is sending out an update to BlueCruise that will enhance its functionality with some nice features we tend to enjoy on other advanced driver assistance systems. Plus, in addition to BlueCruise getting the update, the Lincoln version named ActiveGlide will get the same update. For starters, both BlueCruise and ActiveGlide will gain hands-free lane changing. Similar to other lane-change assist systems, you’ll prompt the lane change by activating the turn signal. ItÂ’ll scan for traffic, and if all is clear, the vehicle will move into the requested lane. Ford says that itÂ’ll even suggest lane changes to the driver in the cluster as you approach slower-moving traffic. What this new feature doesnÂ’t do, though, are automatic lane changes. Systems like Super Cruise and TeslaÂ’s Autopilot will recognize slower traffic, then make a pass all on their own to move around said traffic — theyÂ’ll even move back over into your previous lane after making the pass. We wouldnÂ’t be surprised if Ford adds this functionality to the system in a future update. Another update in this release is new “In-Lane Repositioning” programming. ItÂ’s designed to recognize when there are vehicles in adjacent lanes and will then shift you further away from them within your lane of travel. Ford says itÂ’s especially helpful when passing semi-trucks, and will give you the usual and more comfortable buffer that a human driver might give a truck. The final update is a Predictive Speed Assist feature that will adjust your speed as you approach a curve. It will signal to the driver in the cluster that the car will slow for a curve, then do so gradually as you approach it. This is the sort of feature we typically like to turn off as soon as possible, since weÂ’d rather just remain at the same speed for curves on the highway. But, if youÂ’re one of those folks who like to slow down for curves on the highway, this will provide a more natural driving feel. Ford says that customers have cumulatively put over 16 million hands-free miles on cars with BlueCruise at this point. This update, simply named 1.2, for BlueCruise and ActiveGlide will see its initial rollout this fall. It will hit the Mustang Mach-E first, and Ford says other vehicles will follow. Related video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. POV drive of the 2021 Ford Mustang Mach-E