Cadillac STS: MPG and fuel economy by year

The EPA has rated the Cadillac STS across 6 model years, from the 2006 Cadillac STS through the 2011 Cadillac STS. The most recent 2011 Cadillac STS returns 21 combined MPG.

Pick a year below to open the full Cadillac STS page for that model year. Each year page covers combined, city, and highway MPG, the trim variants the EPA rates separately, the annual fuel cost across three driving patterns, and a year-over-year comparison so you can see whether the car has improved.

Fuel economy by model year

Combined MPG, city MPG, highway MPG, and the EPA's estimated annual fuel cost for every model year of the Cadillac STS. Click any year to see the full breakdown for that model year, including trim variants, the drivetrain, and a comparison against other vehicles in its segment.

Year	Model	Combined MPG	City	Highway	Annual fuel cost
2011	2011 Cadillac STS	21 MPG	18 MPG	27 MPG	$2,850
2010	2010 Cadillac STS	21 MPG	18 MPG	27 MPG	$2,850
2009	2009 Cadillac STS	20 MPG	17 MPG	26 MPG	$3,000
2008	2008 Cadillac STS	20 MPG	17 MPG	26 MPG	$3,000
2007	2007 Cadillac STS	19 MPG	16 MPG	25 MPG	$3,150
2006	2006 Cadillac STS	19 MPG	16 MPG	25 MPG	$3,150

How the Cadillac STS compares against the Midsize Cars class

Buyers usually compare the Cadillac STS against other cars in the same EPA class. The list below shows the most efficient cars in the Midsize Cars class for the 2011 model year, the latest year on this page. Each link opens the full page for that car.

Source: U.S. EPA fuel economy dataset. Annual fuel cost assumes 15,000 miles of driving per year and a 55% city, 45% highway split.