X 2010 Audi A8

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

MSRP: $74,550

EPA Fuel Economy

Combined: 18 MPG

City: 16 MPG

Highway: 23 MPG

X 2008 Infiniti QX56 2WD

5.6 L, 8 cyl, Auto 5-spd, Premium Gasoline

EPA Fuel Economy

Combined: 14 MPG

City: 12 MPG

Highway: 18 MPG