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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.

Did a US automaker blow the whistle on Hyundai, Kia fuel economy issue?

In all of the most hotly contested mainstream segments of the motoring universe, the difference of one mile per gallon averaged on a widow sticker can mean the difference between a sale and a walk-off - to say nothing of two or three mpg. So, when Hyundai and Kia were forced to reveal that many of their 40-mpg ratings were actually 38s and 37s, well, it made for big news.
It also, conceivably, made for a competitive disadvantage immediately, when the Korean automakers' products were being shopped versus the guys down the block. And it's that disadvantage that makes a recent story from Automotive News so juicy.
AN is reporting that Margo Oge, former head of the Environmental Protection Agency's Office of Transportation and Air Quality, got a tip in 2010 that Hyundai/Kia were "cheating" to get its impressive fuel economy numbers. The tip, said Oge (who retired from the EPA this past September), came from a senior vice president from a domestic automaker. The source was credible enough for Oge to launch an audit of the Hyundai figures, which ultimately lead to the debacle that we reported on a few months ago, and that the Korean company has been trying to bounce back from ever since.

Ford bringing C-Max Solar Energi Concept to CES

Solar energy might not be enough to power a usable electric vehicle on its own, but that doesn't mean it can't lend a helping hand. And that's what Ford has in store for the Consumer Electronics Show opening next week in Las Vegas.
Ford has essentially taken its C-Max Energi plug-in hybrid and fitted it with the latest in solar panel technology developed by SunPower, acting like a magnifying glass to capture as much of the sun's energy as possible. So you get the benefit of an electric vehicle, with the range assurance of a hybrid, without needing to draw from the grid.
Ford estimates that a day of charging in the sunshine will give the C-Max Solar Energi concept the same full charge as the production PHEV, with a total range of 620 miles - 21 of which can be run on electric power alone. Otherwise the vehicle - which remains a concept for the time being - is identical to the existing C-Max Energi. The top-selling model in Ford's growing hybrid and electric vehicle portfolio helps put Ford just behind Toyota among the top seller of hybrids in America. Scope out the images in the gallery above and the video clip and press release below for a closer look.