2010 Cadillac STS — Full Specifications
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The 2010 Cadillac STS is a saloon/sedan offered with 2 engines (3.6L 6-cyl, 4.6L 8-cyl). Its most fuel-efficient configuration returns around 25 mpg (UK) / 21 mpg (US EPA) combined, with 20–25 mpg (UK) across all configurations. Owners often keep a Cadillac STS workshop manual to hand for servicing and repairs.
Full Specifications
| Engine (most efficient) | 3.6L 6-cyl |
|---|---|
| Engine options | 3.6L 6-cyl · 4.6L 8-cyl |
| Transmission (most efficient) | Automatic (S6) |
| Fuel Type | Regular Gasoline |
| Powertrain | Conventional |
| Drive | All-Wheel Drive |
| Body Style | Saloon/Sedan |
| Passenger Volume (EPA) | 102 cu ft (2,888 L) |
| Luggage Volume (EPA) | 14 cu ft (396 L) |
| Fuel Economy (UK) | 25 combined / 22 urban / 32 extra-urban mpg |
| Fuel Economy (US EPA) | 21 combined / 18 city / 27 highway mpg |
| CO₂ Emissions | 263 g/km |
| EPA Est. Annual Fuel Cost | $3,200 (15,000 mi/yr, US prices) |
Engine & Transmission Options
EPA lists 4 configurations for the 2010 Cadillac STS across 2 engines (3.6L 6-cyl, 4.6L 8-cyl). Combined fuel economy ranges from 17 to 21 mpg (US), or 20 to 25 mpg (UK), depending on engine, transmission and drive. The headline figures at the top of this page describe the most fuel-efficient configuration.
| Engine | Transmission | Drive | MPG (UK) | MPG (US) | CO₂ g/km | Fuel cost / yr |
|---|---|---|---|---|---|---|
| 3.6L 6-cyl | Automatic (S6) | All-Wheel Drive | 25 | 21 (18/27) | 263 | $3,200 |
| 3.6L 6-cyl | Automatic (S6) | Rear-Wheel Drive | 25 | 21 (18/27) | 263 | $3,200 |
| 4.6L 8-cyl | Automatic (S6) | All-Wheel Drive | 20 | 17 (15/22) | 325 | $3,950 |
| 4.6L 8-cyl | Automatic (S6) | Rear-Wheel Drive | 22 | 18 (15/24) | 307 | $3,700 |
MPG (US) shows combined, with city/highway in brackets. Highlighted row = the configuration used for the headline figures. Source: US EPA fueleconomy.gov.
EPA measures interior passenger volume at 102 cubic feet (about 2,888 litres) and luggage volume at 14 cubic feet (about 396 litres). These are US EPA interior-volume figures; they are measured differently from the boot capacity numbers UK manufacturers quote.
Owner Essentials for the 2010 Cadillac STS
Running Costs: 2010 Cadillac STS
Covering around 8,000 miles a year in a 2010 Cadillac STS at 25 mpg combined, expect roughly 1,455 litres of fuel annually — multiply by your local price per litre for a cost estimate. For US owners, the EPA estimates about $3,200 a year in fuel for the most efficient configuration (15,000 miles, national average prices). Work out exact fuel costs with the fuel cost calculator on 247Calculators.
Convert between MPG and L/100km with the unit converters on 247QuickTools. Not sure what tyre size fits? 247TyreCheck explains tyre sizing.
Only need this car occasionally? See our buy vs rent comparison.
2010 Cadillac STS Safety Ratings (NHTSA)
No NHTSA crash-test rating is on record for this model year. The NHTSA rates only a subset of vehicles each year; you can browse every rated vehicle on our NHTSA Safety Ratings hub.
Recalls & Owner Complaints (NHTSA)
NHTSA lists no safety recall campaigns for the 2010 Cadillac STS as of 6 October 2026. Recalls can be issued years after a model is sold, so it is still worth checking your own VIN.
Owners have filed 4 complaints with NHTSA about the 2010 Cadillac STS. The most-reported areas are Fuel/propulsion system (1), Electrical system (1), Structure (1).
Used-buyer checklist for the 2010 Cadillac STS
Based on where NHTSA recalls and owner complaints cluster for this model year, these are the areas worth checking before you buy:
- Fuel system (1 owner complaint) — Ask whether any fuel-pump or fuel-system recalls were completed, and watch for hard starting or stalling.
- Electrical system (1 owner complaint) — Test every switch, window, light and warning lamp on a test drive, and ask about battery or alternator replacements.
- Body structure (1 owner complaint) — Inspect for corrosion and for subframe or body-panel damage, especially underneath.
- Stability control (1 owner complaint) — Make sure no stability or traction warning light stays on.
Source: US NHTSA recall and consumer-complaint databases, retrieved 6 October 2026. Complaints are unverified owner reports, not confirmed defects. Check any vehicle by VIN at nhtsa.gov/recalls, and see our guide to checking a used car for recalls.
How It Compares
Cadillac models in our database average about 27 mpg (UK) combined on their most efficient configuration; the 2010 Cadillac STS's 25 mpg is 2 mpg below that make average. Its 263 g/km CO₂ figure is 15 g/km higher than the 248 g/km Cadillac average.
Last updated: · Data: US EPA (fueleconomy.gov) and NHTSA safety ratings 18 July 2026; NHTSA recalls and complaints 6 October 2026; Wikidata & curated EU catalogue 18 July 2026; European generation and engine data from Wikipedia 7 October 2026
Vehicle data sourced from manufacturer specifications. Always verify with your vehicle handbook or a qualified mechanic. This is a reference tool, not professional advice.
Recommended Accessories for the 2010 Cadillac STS
Frequently Asked Questions
What engine does the 2010 Cadillac STS have?
EPA lists 2 engines for the 2010 Cadillac STS: 3.6L 6-cyl, 4.6L 8-cyl. The most fuel-efficient configuration pairs the 3.6L 6-cyl with a automatic (s6).
What is the fuel economy of the 2010 Cadillac STS?
The most efficient configuration returns around 25 mpg (UK) combined, or 21 mpg on the US EPA cycle. Across all configurations the UK combined figure runs from 20 to 25 mpg.
How much does the 2010 Cadillac STS cost to fuel per year?
The US EPA estimates about $3,200 a year in fuel for the most efficient configuration, based on 15,000 miles of mixed driving and national average fuel prices. Your own cost will depend on mileage and local prices.
Does the 2010 Cadillac STS have any recalls?
NHTSA lists no safety recall campaigns for the 2010 Cadillac STS as of 6 October 2026. Recalls can be issued years after a model is sold, so it is still worth checking your own VIN.
What are the most common problems reported for the 2010 Cadillac STS?
Among the 4 owner complaints filed with NHTSA, the most-reported areas are Fuel/propulsion system (1 complaint), Electrical system (1 complaint), Structure (1 complaint). Complaints are unverified owner reports, not confirmed defects, and raw counts rise with how many cars were sold.
How much interior and luggage space does the 2010 Cadillac STS have?
EPA measures interior passenger volume at 102 cubic feet (about 2,888 litres) and luggage volume at 14 cubic feet (about 396 litres). These are US EPA interior-volume figures, which are measured differently from the UK boot-capacity numbers manufacturers quote.