Even without official EPA figures, we were fairly confident the 2014 Ram 1500 EcoDiesel would top the 1/2-ton truck segment in fuel economy. Ironically, it's closest competition was the Ram 1500 equipped with the 3.6-liter Pentastar V-6 and eight-speed automatic, which achieved up to 18 mpg city and 25 mpg highway, depending on configuration. Subjected to Motor Trend's recently instituted "Real MPG" tests, conducted using scientific exhaust analyzers and a standardized 88-mile route, the 2014 Ram EcoDiesel 4x4 achieved 19 city and 26 highway with the shorter 3.92 axle ratio, and 18 city, 28 highway with the taller 3.55 axle ratio. That puts its combined fuel economy figure at 21-22 mpg. For a 3-ton truck with up to a 9200-pound towing capacity, that's a highly respectable figure.

With only 240 hp compared with the Ford EcoBoost's 365 or the Hemi's 395, the VM Motori-sourced 3.0-liter V-6 diesel doesn't exactly leap for the horizon with top-end power, but the 420 lb-ft of torque, combined with the abundance of ratios of the TorqueFlite 8 make the EcoDiesel a torquey, relaxed cruiser that's comfortable doing double-duty as a commuter as well as an occasional toy hauler for a travel trailer, boat or personal watercrafts.

We know a new 2015 Ford F-150 is coming, but we're not aware of any diesel options for Dearborn's new 1/2-tonner. How will it counter Ram's mileage champ? It's anyone's guess, but it looks like Ram may hold the title for a few years with the segment's only light-duty V-6 diesel.

Source: Motor Trend