2000 Ford Explorer Xl Fleet Sport Utility 4-door 4.0l 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.

NHTSA closes Ford F-150 EcoBoost acceleration probe

Typically when we report on the findings of an investigation from the National Highway Traffic Safety Administration, it's because the government body has discovered a safety issue and prescribed a recall. In this case, however, NHTSA has closed an investigation into a reported performance deficit without ever getting to the recall stage.
The issue revolves around the Ford F-150 - specifically those equipped with the 3.5-liter EcoBoost engine - of which some 360,000 were built in the 2011, 2012 and 2013 model years. After receiving an initial 95 complaints, NHTSA opened an investigation last May - almost a year ago - into the reported issue of reduced engine power under hard acceleration. The agency has since received a total of 525 such complaints, and Ford itself reported receiving over 4,000.
Together, NHTSA and Ford determined that the problem resulted from cylinders misfiring, an issue itself stemming from water getting into the charge air cooler (CAC) mated to the turbochargers. In particularly humid or rainy conditions, water was found to get into the CAC, causing some of the cylinders to misfire, which in turn triggered the ECU to disable those cylinders in order to protect the catalytic converter from damage.

Ford Police Interceptor with 2.0L EcoBoost rated most fuel-efficient police sedan

Back in September, Ford announced a non-pursuit version of its Police Interceptor Sedan, which swaps out a choice of two V6 engines for a fuel-efficient 2.0-liter EcoBoost inline four-cylinder. This Special Service Police Sedan will be marketed to law enforcement agencies looking to cut fuel costs and don't need the extra power.
For college campuses, detectives and the like, this new police car has now been certified with EPA fuel economy estimates of 20 miles per gallon in the city, 32 mpg on the highway and a combined rating of 24 mpg. These figures represent a decrease of two mpg in city and combined ratings compared to the civilian-spec 2014 Taurus. These police cars still offer active grille shutters for better aerodynamics, although we're guessing agencies upfitting their cars with light bars and push bumpers aren't exactly concerted with aerodynamics. The true benefit of the SSP version is when it's compared against other police sedan options like the Dodge Charger, Chevy Impala, Chevy Caprice and even the V6 Police Interceptor Sedan.
Ford claims the new Police Interceptor Sedan SSP is the most fuel-efficient current option for police departments, saying that this car can save $1,720 per car over three years and almost $260,000 over the same span of time for fleets with 150 vehicles. There is an official press release posted below, and also check out the gallery of images from Ford collected from various police agencies across the US (although none show the 2.0-liter SSP model). Head on over to Ford's Police Interceptor mini-site for even more pictures of the Police Interceptor Sedan and Utility.