The 2WD four-cylinder Frontier rates as high as 19 mpg city and 23 mpg highway for a combined rating of 21 mpg, when equipped with the five-speed manual transmission. Opting for the five-speed automatic gearbox brings those figures down to 17/23/19 mpg. With the V-6, the 2WD Frontier rates 16/22/19 mpg city/highway/combined with a six-speed manual, or 16/22/18 mpg with the five-speed automatic.
In 4WD form, the 2014 Nissan Frontier is only available with the V-6 engine. Manual-equipped versions score 16 mpg city, 21 mpg highway, and 18 mpg combined; with the automatic, it rates 15/21/17 mpg.
Those figures make the Frontier more efficient than the Titan, but then the Titan is one of the thirstiest pickups on the road. Several full-size V-6 models in their base forms do better at the pump, and should merit consideration for the truck buyer that also covers lots of miles each year.