X 2010 GMC Sierra K15 AWD

6.2 L, 8 cyl, Auto 6-spd, Regular Gasoline or E85

MSRP: $46,435

EPA Fuel Economy

Regular Gasoline

Combined: 14 MPG

City: 12 MPG

Highway: 19 MPG

E85

Combined: 11 MPG

City: 9 MPG

Highway: 13 MPG

X 2002 Audi A8 quattro

4.2 L, 8 cyl, Auto (S5), Premium Gasoline

EPA Fuel Economy

Combined: 18 MPG

City: 15 MPG

Highway: 23 MPG