Cadillac STS-V MPG by year — every rating on record
The Cadillac STS-V has a combined EPA fuel economy rating for 4 model years, from 2006 to 2009. Across those years its best rated version returned 15 mpg (2007) and its thirstiest returned 14 mpg (2006). The EPA record holds 4 configurations for this nameplate, most recently a Midsize Cars.
Year-by-year EPA ratings
| Model year | Configurations | Best combined | Worst combined | Class rank that year | Drivetrains | Fuel | EPA class |
|---|---|---|---|---|---|---|---|
| 2006 | 1 | 14 mpg | 14 mpg | #56 of 61 (8th pct) | Rear-Wheel Drive | Premium | Midsize Cars |
| 2007 | 1 | 15 mpg | 15 mpg | #61 of 68 (10th pct) | Rear-Wheel Drive | Premium | Midsize Cars |
| 2008 | 1 | 15 mpg | 15 mpg | #62 of 70 (12th pct) | Rear-Wheel Drive | Premium | Midsize Cars |
| 2009 | 1 | 15 mpg | 15 mpg | #60 of 66 (9th pct) | Rear-Wheel Drive | Premium | Midsize Cars |
Where it has stood in its class
Ranked against every other nameplate the EPA filed under the same class that year. The Cadillac STS-V placed highest in 2006 at #56 of 61, and lowest in 2008 at #62 of 70. It spent 0 of its 4 ranked years in the top half of its class.
Every configuration on record
All 4 configurations EPA lists for this nameplate, newest first.
| Year | Configuration | Engine detail | City | Highway | Combined | Gallons/yr | Barrels/yr | EPA fuel cost/yr | CO2 g/mi | GHG |
|---|---|---|---|---|---|---|---|---|---|---|
| 2009 | 4.4L 8-cyl Rear-Wheel Drive Automatic (S6) Premium | 4.4L 8-cyl, supercharged | 13 | 19 | 15 | 766.7 | 19.8 | $5,150 | 592.4666666666667 | n/a |
| 2008 | 4.4L 8-cyl Rear-Wheel Drive Automatic (S6) Premium | 4.4L 8-cyl, supercharged | 13 | 19 | 15 | 766.7 | 19.8 | $5,150 | 592.4666666666667 | n/a |
| 2007 | 4.4L 8-cyl Rear-Wheel Drive Automatic (S6) Premium | 4.4L 8-cyl, supercharged | 12 | 19 | 15 | 766.7 | 19.8 | $5,150 | 592.4666666666667 | n/a |
| 2006 | 4.4L 8-cyl Rear-Wheel Drive Automatic (S6) Premium | 4.4L 8-cyl, supercharged | 12 | 19 | 14 | 821.4 | 21.3 | $5,550 | 634.7857142857143 | n/a |
How the rating has moved between model years
Comparing the best-rated configuration of each year. 1 of 1 year-over-year steps improved the top rating.
| Change | Best combined | Delta | Gallons a year at the newer rating |
|---|---|---|---|
| 2006 → 2007 | 14 → 15 mpg | +1 mpg | 767 gal |
What STS-V fuel costs over a year
At the EPA's 11,500 miles a year, the 2009 Cadillac STS-V burns 767 to 767 gallons depending on configuration. Below is what that costs at three pump prices, and how much more the thirstiest configuration costs than the most efficient one.
| Pump price | Most efficient | Thirstiest | Spread |
|---|---|---|---|
| $3.00/gal | $2,300 | $2,300 | $0 |
| $3.50/gal | $2,683 | $2,683 | $0 |
| $4.00/gal | $3,067 | $3,067 | $0 |
EPA’s own estimate for the 2009 model year is $5,150 to $5,150 a year in fuel, or $14,500 more than the average new vehicle over five years.
How it compares with other Midsize Cars
Across the 483 nameplates EPA classifies as Midsize Cars, the median best combined rating is 25 mpg. At 15 mpg the Cadillac STS-V is 10 mpg below the median, which is worth about $1,073 a year at $3.50 a gallon.
- All Midsize Cars rankings — every nameplate in the class, best to worst.
Other Cadillac nameplates
Every Cadillac model compared → — all nameplates ranked by best combined rating, with what each one costs a year.