X 1998 GMC Sierra 1500 4WD

6.5 L, 8 cyl, Auto 4-spd, Diesel

EPA Fuel Economy

Combined: 15 MPG

City: 13 MPG

Highway: 17 MPG

X 1990 Oldsmobile Silhouette 2WD

3.1 L, 6 cyl, Auto 3-spd, Regular Gasoline

EPA Fuel Economy

Combined: 18 MPG

City: 16 MPG

Highway: 21 MPG