2010 Cadillac STS
4 configurations — EPA fuel economy ratings
| Trim / Variant | City MPG | Hwy MPG | Combined MPG | Fuel | Drive | Engine | Transmission |
|---|---|---|---|---|---|---|---|
| STS | 18 | 27 | 21 | Regular Gasoline | Rear-Wheel Drive | 3.6L 6-cyl | Automatic (S6) |
| STS | 15 | 24 | 18 | Regular Gasoline | Rear-Wheel Drive | 4.6L 8-cyl | Automatic (S6) |
| STS AWD | 18 | 27 | 21 | Regular Gasoline | All-Wheel Drive | 3.6L 6-cyl | Automatic (S6) |
| STS AWD | 15 | 22 | 17 | Regular Gasoline | All-Wheel Drive | 4.6L 8-cyl | Automatic (S6) |