Scores 21 Highway MPG and 15 City MPG! Carfax One-Owner Vehicle. This Nissan Frontier delivers a Regular Unleaded V-6 4.0 L/241 engine powering this Automatic transmission. PRO-4X, PREMIUM CLOTH SEAT TRIM, PRO-4X, LEATHER APPOINTED SEAT TRIM -inc: PRO-4X Logo, ARCTIC BLUE... via Dealer Center