X 2004 Audi A6

3.0 L, 6 cyl, Auto (variable gear ratios), Premium Gasoline

EPA Fuel Economy

Combined: 21 MPG

City: 18 MPG

Highway: 25 MPG

X 2001 GMC Sierra 1500 2WD

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

EPA Fuel Economy

Combined: 17 MPG

City: 15 MPG

Highway: 20 MPG