X 2004 Ford F150 Dual-fuel 4WD (CNG)

5.4 L, 8 cyl, Auto 4-spd, Regular Gasoline or Natural Gas

EPA Fuel Economy

Regular Gasoline

Combined: 12 MPG

City: 11 MPG

Highway: 14 MPG

Natural Gas

Combined: 11 MPG

City: 10 MPG

Highway: 13 MPG

X 2009 Audi A6 Avant quattro

3.0 L, 6 cyl, Auto (S6), Premium Gasoline

EPA Fuel Economy

Combined: 21 MPG

City: 18 MPG

Highway: 26 MPG