Buick Riviera Convertible Fuel Economy History

MPG by year — EPA official data.

Best MPG Year

1985

17 MPG combined

Latest Model

1985

17 MPG combined

Year	Engine	City	Hwy	Combined	Fuel Cost/yr
1985	Regular	15	21	17	$3,950	Details →
1984	Regular	14	20	16	$4,200	Details →