X 1998 Nissan Frontier 4WD

2.4 L, 4 cyl, Man 5-spd, Regular Gasoline

EPA Fuel Economy

Combined: 17 MPG

City: 16 MPG

Highway: 19 MPG

X 2005 Chevrolet Silverado 2500 HD 2WD CNG

6.0 L, 8 cyl, Auto 4-spd, Natural Gas

EPA Fuel Economy

Combined: 9 MPG

City: 8 MPG

Highway: 11 MPG