X 2010 Roush Performance Stage 3 Mustang

4.6 L, 8 cyl, Man 5-spd, Premium Gasoline

EPA Fuel Economy

Combined: 18 MPG

City: 15 MPG

Highway: 23 MPG

X 2008 Porsche Cayman

2.7 L, 6 cyl, Man 6-spd, Premium Gasoline

EPA Fuel Economy

Combined: 22 MPG

City: 19 MPG

Highway: 28 MPG