2013 Mustang V6 3.7l Automatic Premium Black Leather Mag Wheels 5,000 Miles on 2040-cars

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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.

Last 2014 Ford Shelby GT500 Convertible nets $500k for charity at Barrett-Jackson [w/video]

The last 2014 Ford Shelby GT500 Convertible was sold on Saturday at a Barrett-Jackson auction in Reno, Nevada, for $500,000. Ford donated the Mustang to be auctioned for charity, and all of the money is going to the Brain Injury Association of America.
Parnelli Jones, winner of the 1963 Indianapolis 500, was there on behalf of the BIAA with his son Page, who suffered a brain injury in a sprint car crash in 1994. The bidding increased quickly, reaching $500k in no time, spreading a bit more hope to people who live with brain injuries.
The winning bidder will be able to choose the GT500's exterior, interior and stripe colors, and is scheduled to receive the car, signed by Parnelli Jones in appreciation for the donation, by the end of 2013. Watch the video below to see the auction-block action.

American automakers fall in latest Fortune 500 rankings

Not that it means anything beyond bragging rights, but if you're fixated on the positions of domestic automakers on the annual Fortune 500 list, both General Motors and Ford are still on it but they've slipped a couple of notches. The list ranks American companies and they're ordered solely by revenue. GM, fifth last year, came in seventh, while Ford fell from ninth to tenth even though both companies saw small gains in annual revenue.
GM's $152.3 billion in revenue was less than a third of that of the first company on the list: Wal-Mart, which regained the title from Exxon Mobil. Berkshire Hathaway and Apple are the firms that moved GM down. Ford, displaced by energy company Valero, had $134.3 billion in revenue.
On a side note, profitability isn't a factor, but both GM and Ford were down in this year's list compared to last year's: GM declined from $9.2 billion to $6.2 billion, Ford fell from $20.2 billion to $5.6 billion. If profits were included, Exxon Mobil would probably still be king: although the energy company made almost $20 billion less in revenue than Wal-Mart's $469.2 billion, it posted $44.9 billion in profit compared to Wal-Mart's $17 billion.