First introduced in 1998 as a compact pickup, the Nissan Frontier grew to become a mid-sized truck with a 2005 redesign. The Frontier’s gas mileage ratings fall a shade behind the Toyota Tacoma, with the current model’s highway ratings topping out at 23 miles per gallon (MPG) in the 4-cylinder manual transmission-equipped 2WD. The 2008 Nissan Frontier is available with two engines: a 2.5-liter DOHC 16-valve 4-cylinder rated at 152 horsepower (HP) and a 4.0-liter DOHC 24-valve V-6 engine rated at 261 HP.
While a diesel engine is not currently available in Frontiers sold in North American a torquey 2.5 liter DOHC intercooled turbo-diesel is available under the hood of the Frontier overseas, where it is known as the Navara. As a point of comparison, manual transmission-equipped diesel King and Double cab Navaras are rated at 23.9 urban / 32.8 extra urban MPG in the UK. That’s roughly 19.9 city and 27.3 highway here in the States.