Cadillac STS Fuel Economy History

MPG by year — EPA official data.

Best MPG Year

2011

21 MPG combined

Latest Model

2011

21 MPG combined

Year	Engine	City	Hwy	Combined	Fuel Cost/yr
2011	Regular	18	27	21	$3,200	Details →
2010	Regular	18	27	21	$3,200	Details →
2009	Regular	17	26	20	$3,400	Details →
2008	Regular	17	26	20	$3,400	Details →
2007	Regular	16	25	19	$3,550	Details →
2006	Regular	16	25	19	$3,550	Details →