According to the Fuel Economy website of the United States Department of Energy, the most fuel efficient small pickup truck of 2014 is the Toyota Tacoma 2WD with a combined fuel economy of 23 miles per gallon. The truck has a fuel efficiency of 21 mpg for city driving and 25 mpg on the highway.
The 2014 Toyota Tacoma 2WD has a 2.7 liter engine that runs on regular or unleaded gasoline. It has a 5-speed manual transmission and a rear wheel drivetrain. The Toyota Tacoma pickup series was introduced and manufactured in the U.S. since 1995.
From 1995 to 2004, Tacoma pickups of the first generation were compact pickups. Second generation Tacoma models from 2005 to 2014 were mid-sized pickup trucks. As of 2014, the Toyota Tacoma is also being sold in Mexico, Canada, Bolivia, Chile and Panama.
Among the standard pickup size, the 2014 Dodge Ram 1500 2WD is the most fuel-efficient with a combined fuel efficiency of 23 miles per gallon, according to the Fuel Economy website. This pickup model has a 6 cylinder, 3.0 liter diesel engine with an 8-speed automatic transmission. At the other side of the spectrum among small pickup trucks, the Fuel Economy website lists the 2014 Nissan Frontier 4WD as the least efficient with combined fuel economy of only 17 miles per gallon.