Chevrolet Cavalier (Bi-fuel CNG) Fuel Economy History

MPG by year — EPA official data.

Best MPG Year

2001

23 MPG combined

Latest Model

2001

23 MPG combined

Year	Engine	City	Hwy	Combined	Fuel Cost/yr
2001	Gasoline or natural gas Bifuel (CNG)	20	28	23	$2,950	Details →
2000	Gasoline or natural gas Bifuel (CNG)	20	25	22	$3,050	Details →