Chrysler's Ram 1500 pickups now offer some of the highest fuel-economy ratings in the full-size truck segment, with a new turbodiesel rated at 20/28 mpg, or 23 mpg combined.
This year's base Ram 1500--the one with the Pentastar 3.6-liter V-6 and eight-speed automatic (and rear-wheel drive)--carries over its gas-mileage ratings of 17 miles per gallon city, 25 miles per gallon highway, and 20 mpg combined. The GMC Sierra and Chevy Silverado V-6 are rated at 18/24 mpg, or 20 mpg combined; we'll call that a draw. The Ford F-150 with the 3.5-liter V-6 and six-speed automatic checks in at 16/22 mpg or 18 mpg combined. Chalk up that as a win--for Ram.
The gas-powered Ram can equal the GMC's city numbers, in HFE trim. That's where it adds active air shutters and stop/start, to boost city gas mileage to 18 mpg. However, once you option up to four-wheel drive, those numbers drop to 16/23 mpg.
The Ram's mid-line 4.7-liter V-8 has been deleted for this model year, so the next step up the ladder is the HEMI V-8, now with either the eight-speed automatic or the older six-speed automatic, depending on the model. The 5.7-liter engine earned an EPA rating of 15/22 mpg or 17 mpg combined when outfitted with rear-wheel drive and the new gearbox; it's carryover 14/20/16 mpg numbers with the six-speed automatic. Four-wheel drive pulls the eight-speed model down to 15/21/17 mpg--not much worse than the V-6 F-150--and the six-speed, to 13/19/15 mpg.