X 2006 Audi A8

4.2 L, 8 cyl, Auto (S6), Premium Gasoline

EPA Fuel Economy

Combined: 18 MPG

City: 16 MPG

Highway: 22 MPG

X 1999 Mercury Mountaineer 2WD

4.0 L, 6 cyl, Auto 5-spd, Regular Gasoline

EPA Fuel Economy

Combined: 16 MPG

City: 14 MPG

Highway: 19 MPG