X 1988 Ford Thunderbird

5.0 L, 8 cyl, Auto 4-spd, Regular Gasoline

EPA Fuel Economy

Combined: 19 MPG

City: 16 MPG

Highway: 24 MPG

Average: 22.7 MPG

Range: 23  to  23 MPG

Based on 1 vehicle

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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