X 2009 BMW M3 Convertible

4.0 L, 8 cyl, Auto (S7), Premium Gasoline

EPA Fuel Economy

Combined: 16 MPG

City: 14 MPG

Highway: 20 MPG

X 2000 Porsche 911 Carrera

3.4 L, 6 cyl, Auto 5-spd, Premium Gasoline

EPA Fuel Economy

Combined: 18 MPG

City: 15 MPG

Highway: 23 MPG