1998 Nissan frontier 4x4 gas mileage Gas Mileage of 1998 Vehicles by Nissan - Fuel Economy Flex-Fuel Vehicles Flex-Fuel Links Fuel Economy of 1998 Nissan Vehicles. EPA MPG 1998 Nissan Frontier 2WD 4 cyl, Used 1998 Nissan Frontier... Source Source Source Source Source Source Source Source Source Source Read Also: 1998 Nissan frontier xe gas mileage 1998 Nissan frontier gas mileage 1998 Nissan sentra gxe fuel economy 1998 Nissan frontier 4x4 mpg 1998 Nissan terrano fuel consumption 1998 Nissan sentra se gas mileage