MPG AtlasCadillac STS MPG
EPA fuel economy for 25 Cadillac STS trims sold from 2005 to 2011. Best ever: 21 MPG (2011 STS). Latest model year 2011: 21 MPG combined across 2 trims.
Cadillac STS fuel cost calculator
Enter what you pay for fuel and how far you drive in a year. The starting prices are the ones the EPA uses for its own yearly fuel-cost estimates. Every cost on this page updates as you type.
At $4.16 a gallon for regular and 15,000 miles a year, every 2011 Cadillac STS trim costs about $2,970 a year to fuel.
| 2011 trim | Engine | Transmission | Drive | Fuel | Comb | Cost/yr | vs cheapest |
|---|---|---|---|---|---|---|---|
| STS | 3.6 L, 6 cyl | Auto (S6) | RWD | Regular | 21 | $2,970 | cheapest |
| STS AWD | 3.6 L, 6 cyl | Auto (S6) | AWD | Regular | 21 | $2,970 | cheapest |
Cost per year is miles per year divided by the EPA combined rating, times your fuel price; electric vehicles use the EPA's kWh per 100 miles instead. Rounded to the nearest $10. Your prices are kept in this browser only.
Cadillac STS MPG by year
| Year | Best combined | City | Hwy | Best trim that year | Trims |
|---|---|---|---|---|---|
| 2011 | 21 | 18 | 27 | STS, 3.6 L, 6 cyl, Auto (S6) | 2 |
| 2010 | 21 | 18 | 27 | STS, 3.6 L, 6 cyl, Auto (S6) | 4 |
| 2009 | 20 | 17 | 26 | STS, 3.6 L, 6 cyl, Auto (S6) | 4 |
| 2008 | 20 | 17 | 26 | STS, 3.6 L, 6 cyl, Auto (S6) | 4 |
| 2007 | 19 | 16 | 25 | STS, 3.6 L, 6 cyl, Auto (S5) | 4 |
| 2006 | 19 | 16 | 25 | STS, 3.6 L, 6 cyl, Auto (S5) | 4 |
| 2005 | 18 | 16 | 23 | STS 2WD, 3.6 L, 6 cyl, Auto (S5) | 3 |
Every Cadillac STS trim
| Year | Trim | Engine | Transmission | Drive | Fuel | City | Hwy | Comb | CO2 g/mi | Fuel cost/yr |
|---|---|---|---|---|---|---|---|---|---|---|
| 2011 | STS | 3.6 L, 6 cyl | Auto (S6) | RWD | Regular | 18 | 27 | 21 | 423 | $2,970 |
| 2011 | STS AWD | 3.6 L, 6 cyl | Auto (S6) | AWD | Regular | 18 | 26 | 21 | 423 | $2,970 |
| 2010 | STS | 3.6 L, 6 cyl | Auto (S6) | RWD | Regular | 18 | 27 | 21 | 423 | $2,970 |
| 2010 | STS AWD | 3.6 L, 6 cyl | Auto (S6) | AWD | Regular | 18 | 27 | 21 | 423 | $2,970 |
| 2010 | STS | 4.6 L, 8 cyl | Auto (S6) | RWD | Regular | 15 | 24 | 18 | 494 | $3,470 |
| 2010 | STS AWD | 4.6 L, 8 cyl | Auto (S6) | AWD | Regular | 15 | 22 | 17 | 523 | $3,670 |
| 2009 | STS | 3.6 L, 6 cyl | Auto (S6) | RWD | Regular | 17 | 26 | 20 | 444 | $3,120 |
| 2009 | STS AWD | 3.6 L, 6 cyl | Auto (S6) | 4WD/AWD | Regular | 17 | 26 | 20 | 444 | $3,120 |
| 2009 | STS | 4.6 L, 8 cyl | Auto (S6) | RWD | Premium | 15 | 24 | 18 | 494 | $4,300 |
| 2009 | STS AWD | 4.6 L, 8 cyl | Auto (S6) | 4WD/AWD | Premium | 15 | 22 | 17 | 523 | $4,550 |
| 2008 | STS | 3.6 L, 6 cyl | Auto (S6) | RWD | Regular | 17 | 26 | 20 | 444 | $3,120 |
| 2008 | STS AWD | 3.6 L, 6 cyl | Auto (S6) | 4WD/AWD | Regular | 17 | 26 | 20 | 444 | $3,120 |
| 2008 | STS | 4.6 L, 8 cyl | Auto (S6) | RWD | Premium | 15 | 24 | 18 | 494 | $4,300 |
| 2008 | STS AWD | 4.6 L, 8 cyl | Auto (S6) | 4WD/AWD | Premium | 14 | 21 | 16 | 555 | $4,840 |
| 2007 | STS | 3.6 L, 6 cyl | Auto (S5) | RWD | Regular | 16 | 25 | 19 | 468 | $3,280 |
| 2007 | STS | 4.6 L, 8 cyl | Auto (S6) | RWD | Premium | 15 | 24 | 18 | 494 | $4,300 |
| 2007 | STS AWD | 3.6 L, 6 cyl | Auto (S5) | 4WD/AWD | Regular | 16 | 23 | 18 | 494 | $3,470 |
| 2007 | STS | 4.6 L, 8 cyl | Auto (S6) | 4WD/AWD | Premium | 14 | 21 | 16 | 555 | $4,840 |
| 2006 | STS | 3.6 L, 6 cyl | Auto (S5) | RWD | Regular | 16 | 25 | 19 | 468 | $3,280 |
| 2006 | STS | 4.6 L, 8 cyl | Auto (S5) | RWD | Premium | 15 | 24 | 18 | 494 | $4,300 |
| 2006 | STS AWD | 3.6 L, 6 cyl | Auto (S5) | 4WD/AWD | Regular | 15 | 23 | 18 | 494 | $3,470 |
| 2006 | STS AWD | 4.6 L, 8 cyl | Auto (S5) | 4WD/AWD | Premium | 14 | 21 | 17 | 523 | $4,550 |
| 2005 | STS 2WD | 3.6 L, 6 cyl | Auto (S5) | RWD | Regular | 16 | 23 | 18 | 494 | $3,470 |
| 2005 | STS 2WD | 4.6 L, 8 cyl | Auto (S5) | RWD | Premium | 15 | 23 | 18 | 494 | $4,300 |
| 2005 | STS AWD | 4.6 L, 8 cyl | Auto (S5) | 4WD/AWD | Premium | 14 | 21 | 17 | 523 | $4,550 |
CO2 is tailpipe grams per mile from the EPA test. Fuel cost per year uses the prices and miles in the calculator above (the EPA's own prices and 15,000 miles a year until you change them); blank when the fuel has no price here (hydrogen, natural gas).
Compare with other 2011 Midsize Cars
| Vehicle | Combined | City | Hwy |
|---|---|---|---|
| 2011 Nissan Leaf | 99 | 106 | 92 |
| 2011 Toyota Prius | 48 | 49 | 46 |
| 2011 Ford Fusion Hybrid FWD | 38 | 41 | 35 |
| 2011 Lincoln MKZ Hybrid FWD | 38 | 41 | 35 |
| 2011 Mercury Milan Hybrid FWD | 38 | 41 | 35 |
| 2011 Hyundai Sonata Hybrid | 36 | 34 | 39 |
All Midsize Cars ranked by MPG
Questions people ask
What is the best MPG for a Cadillac STS?
The most efficient Cadillac STS the EPA has rated is the 2011 STS at 21 MPG combined (18 city, 27 highway).
What MPG does the 2011 Cadillac STS get?
Every 2011 Cadillac STS trim is rated 21 MPG combined.
Which Cadillac STS has the worst fuel economy?
The 2008 STS AWD is the lowest rated at 16 MPG combined.
How much does it cost to fuel a Cadillac STS for a year?
At $4.16 a gallon for regular and 15,000 miles a year, every 2011 Cadillac STS trim costs about $2,970 a year to fuel.
More from Cadillac: every Cadillac model. Fuel types on this model: Premium, Regular. EPA classes: Midsize Cars.