X 1996 Pontiac Grand Prix

3.4 L, 6 cyl, Auto 4-spd, Regular Gasoline

EPA Fuel Economy

Combined: 18 MPG

City: 15 MPG

Highway: 24 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