X 1988 Ford Thunderbird

2.3 L, 4 cyl, Auto 4-spd, Regular Gasoline

EPA Fuel Economy

Combined: 17 MPG

City: 15 MPG

Highway: 21 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