X 2005 Cadillac STS 2WD

3.6 L, 6 cyl, Auto (S5), Regular Gasoline

EPA Fuel Economy

Combined: 18 MPG

City: 16 MPG

Highway: 23 MPG

Average: 24.8 MPG

Range: 24  to  25 MPG

Based on 3 vehicles

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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