X 2001 Honda Civic CNG

1.7 L, 4 cyl, Auto (variable gear ratios), Natural Gas

EPA Fuel Economy

Combined: 28 MPG

City: 26 MPG

Highway: 31 MPG

X 2001 Cadillac Catera

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

EPA Fuel Economy

Combined: 18 MPG

City: 16 MPG

Highway: 22 MPG

X 1990 Oldsmobile Cutlass Calais

2.5 L, 4 cyl, Man 5-spd, Regular Gasoline

EPA Fuel Economy

Combined: 23 MPG

City: 19 MPG

Highway: 30 MPG