Cadillac STS — All Years
We have Cadillac STS specifications on file for 2 model years, 2010–2011, covering saloon/sedan trims. Across those years EPA data lists 2 different engines. Combined fuel economy runs from 20 to 25 mpg (UK) depending on year, engine and transmission. Select a year below for full engine, fuel economy, dimensions and safety data.
| Year | Engine(s) | Fuel | MPG (UK) | CO₂ g/km | NHTSA | Recalls | Complaints |
|---|---|---|---|---|---|---|---|
| 2011 | 3.6L 6-cyl | Regular Gasoline | 25 | 263 | — | 0 | 7 |
| 2010 | 3.6L 6-cyl / 4.6L 8-cyl | Regular Gasoline | 20–25 | 263 | — | 0 | 4 |
Engine History
- 3.6L 6-cyl — 2010–2011
- 4.6L 8-cyl — 2010
Engines are those EPA lists for each model year; the MPG (UK) column shows the range across configurations where more than one exists.
Frequently Asked Questions
What years is the Cadillac STS covered on this site?
We have data for 2 model years of the Cadillac STS, from 2010 to 2011.
What engines does the Cadillac STS come with?
EPA data lists: 3.6L 6-cyl (2010–2011); 4.6L 8-cyl (2010).
Which Cadillac STS year has the best fuel economy?
The 2011 model returns the highest combined MPG (UK) on record here, at 25 mpg on its most efficient configuration.
Does the Cadillac STS have a 5-star NHTSA safety rating?
No model year of this car currently has a 5-star overall NHTSA rating on record here — check the individual year pages above for the exact rating available.
Which Cadillac STS model years have the most recalls and complaints?
NHTSA lists no recalls for 2010–2011. Counts are from NHTSA as of 6 October 2026 and change over time; complaints are unverified owner reports.
What body style is the Cadillac STS?
The Cadillac STS is classed as a saloon/sedan on this site.
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