X 2008 Infiniti G35x

3.5 L, 6 cyl, Auto (S5), Premium Gasoline

EPA Fuel Economy

Combined: 19 MPG

City: 17 MPG

Highway: 23 MPG

X 1998 Buick Riviera

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

EPA Fuel Economy

Combined: 19 MPG

City: 16 MPG

Highway: 25 MPG