2009 Cadillac STS — 3.6L 6-cyl, S6 automatic, RWD
This 2009 Cadillac STS (3.6L 6-cyl, S6 automatic, RWD) takes regular (87-octane) gasoline. REGULAR
20
MPG combined (17 city / 26 hwy)
$3,100
est. fuel cost / year (EPA, 15k mi)
—
tailpipe CO₂
Other 2009 Cadillac STS trims
| Trim | Fuel | MPG | Fuel/yr |
|---|---|---|---|
| 4.6L 8-cyl, S6 automatic, RWD | PREMIUM | 18 | $4,300 |
EPA fuel type: Regular · class: Midsize Cars · retrieved 2026-06-14.