2011 Ford F-250 Lariat on 2040-cars

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Ford updates Power Stroke diesel V8, strengthens F-450, tweaks King Ranch

Ford is giving its F-Series Super Duty trucks some upgrades for 2015, and we're happy to say that one of them is an improved Power Stroke diesel V8. Also, Ford is strengthening the top-of-the-line F-450 to handle more abuse. And if wild west-style luxury is your thing, the automaker has performed minor cosmetic updates to its King Ranch Edition trucks, as well.
The turbocharged 6.7-liter Power Stroke V8 is currently rated at 400 horsepower and 800 pound-feet of torque, and Ford only tells us the new and improved Power Stroke can "produce power beyond today's" engine. What, then, did Ford actually improve upon? First, the Blue Oval swapped in a new, larger turbocharger. The new Garrett GT37 turbine unit is 72.5 millimeters in diameter, eclipsing the old GT32's 64-mm diameter piece. Ford states output increases with the new turbo setup, but since the new turbocharger operates at a lower peak pressure than the old one, the automaker was able to eliminate the wastegate system and reduce the engine's complexity. Ford even redesigned the turbo's oil and cooling lines to make the powerplant simpler. A byproduct of the larger turbo is better engine exhaust braking, which is controlled manually by a button on the dashboard.
Ford claims the upgraded diesel engine is more powerful, more robust, more efficient and more refined than before.

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.

Are you Ford's next Bullitt Mustang? [w/poll]

Ford has a long history of offering special editions of its legendary Mustang. One of the most vaunted of those trim packages, though, has only been offered twice. The first time was in 2001, and then again in 2008. Yes, we're talking about the Bullitt.
Named for the infamous Dark Highland Green Mustang Fastback driven by Steve McQueen in the 1968 cop melodrama Bullitt, the car was famous for not just its pilot, but the high-speed chase it took part in during the movie. Now, we think we have images of the next Bullitt.
According to our spy photographers, the paint is a "dead-ringer" for the Dark Highland Green that has signified these special edition Mustangs. While we're inclined to agree, it's also worth pointing out that this shade looks very similar to one of the 2015's other new colors, Guard. We've yet to see one on the road (let alone in such dreary conditions), so it's tough to say for certain.