- Newest year: 2009
- Gas
- Midsize cars
- Same as 2008
2006-2009 Cadillac STS-V MPG & Fuel Cost
4 model years · 14–15 MPG combined
15,000 mi/yr · premium gasoline $5.36/gal (U.S. average, Sep 2026)
Among the costliest midsize car configurations to fuel, MY2009. Ranked against all rated configurations, not sales-weighted.
2006-2009 Cadillac STS-V at a glance
The 2006-2009 Cadillac STS-V covers 4 model years in the EPA database (4 configurations in all), rated 14–15 MPG combined. The newest model year, 2009, costs about $5,360 a year to fuel for its most efficient version, the STS-V 4.4L 8-cyl supercharged RWD (15 MPG), at premium gasoline $5.36/gal (U.S. average, Sep 2026). EPA changed the ratings in 2007 and 2008; 2009 repeat the values of the year before. The best combined rating in the generation, 15 MPG, was reached in 2007, 2008 and 2009.
EPA re-estimated ratings of 1985-2007 vehicles under its 2008 method; these figures are the re-estimated values.
2006-2009 Cadillac STS-V by model year
What the 2009 STS-V 4.4L 8-cyl supercharged RWD costs to drive
Per month
$447
$5,360 a year ÷ 12
Per 25 miles
$8.93
Per 100 miles
$35.73
Five years
$26,800
5 × the yearly cost, prices held at today's level
vs the midsize car median
$2,090more a year
Class median $3,270 a year, MY2009
Based on 15,000 miles a year and premium gasoline $5.36/gal (U.S. average, Sep 2026).
2009 Cadillac STS-V MPG
EPA lists the same ratings for the 2009 Cadillac STS-V as for the 2008 model, so the configurations and costs are the ones in the 2008 section above.See 2008
Gas configurations (1)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| STS-V (Most efficient) | 4.4L 8-cyl supercharged | RWD | 13 | 19 | 15 | $5,360 |
1 configuration requires or recommends higher-octane gasoline and is costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
2008 Cadillac STS-V MPG
15 MPG · $5,360/yr
Versus 2007: The most efficient configuration stays at 15 MPG. Its annual cost stays at $5,360.
Gas configurations (1)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| STS-V (Most efficient) | 4.4L 8-cyl supercharged | RWD | 13 | 19 | 15 | $5,360 |
1 configuration requires or recommends higher-octane gasoline and is costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
2007 Cadillac STS-V MPG
15 MPG · $5,360/yr
EPA re-estimated ratings of 1985-2007 vehicles under its 2008 method; these figures are the re-estimated values.
Versus 2006: The most efficient configuration moves from 14 to 15 MPG, up 1. Its annual cost goes from $5,740 to $5,360, $380 less.
Gas configurations (1)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| STS-V (Most efficient) | 4.4L 8-cyl supercharged | RWD | 12 | 19 | 15 | $5,360 |
1 configuration requires or recommends higher-octane gasoline and is costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
2006 Cadillac STS-V MPG
14 MPG · $5,740/yr
EPA re-estimated ratings of 1985-2007 vehicles under its 2008 method; these figures are the re-estimated values.
Gas configurations (1)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| STS-V (Most efficient) | 4.4L 8-cyl supercharged | RWD | 12 | 19 | 14 | $5,740 |
1 configuration requires or recommends higher-octane gasoline and is costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
Fuel cost by state
Yearly cost of the STS-V 4.4L 8-cyl supercharged RWD: $6,390 in California and $4,650 in Texas, a $1,740 difference.
- California $6,390
- Washington $6,010
- New York $5,290
- Florida $4,890
- Texas $4,650
Similar cars
Closest combined MPG among MY2009 midsize car models.
Generations
- 2006-2009
Frequently asked questions
What gas mileage does the 2006-2009 Cadillac STS-V get?
EPA rates the 2006-2009 Cadillac STS-V at 14–15 MPG combined across 4 configurations and 4 model years. The most efficient version, the 2009 STS-V 4.4L 8-cyl supercharged RWD, is rated 15 MPG (13 city, 19 highway).
Which years had the best MPG in the 2006-2009 Cadillac STS-V?
The STS-V 4.4L 8-cyl supercharged RWD reached the generation's best combined rating, 15 MPG, in 2007, 2008 and 2009. The lowest top rating, 14 MPG, was in 2006.
Did EPA ratings change during the 2006-2009 Cadillac STS-V?
Yes. Ratings changed in 2007 and 2008. In 2009 the values repeat the year before.
How much does it cost to fuel a 2009 Cadillac STS-V per year?
Driving 15,000 miles a year at premium gasoline $5.36/gal (U.S. average, Sep 2026), the STS-V 4.4L 8-cyl supercharged RWD costs about $5,360 a year. Across all 1 configuration the cost runs $5,360 a year.
How much does it cost to drive a 2009 Cadillac STS-V 100 miles?
About $35.73 per 100 miles for the STS-V 4.4L 8-cyl supercharged RWD at premium gasoline $5.36/gal (U.S. average, Sep 2026). That is the annual cost over 15,000 miles divided by 150.
Is the 2009 Cadillac STS-V more efficient in the city or on the highway?
The STS-V 4.4L 8-cyl supercharged RWD is rated 13 city and 19 highway MPG, so it is more efficient on the highway, by 6 MPG.
How does the 2009 Cadillac STS-V compare with other midsize car configurations?
The STS-V 4.4L 8-cyl supercharged RWD costs about $5,360 a year to fuel, $2,090 more than the class median of $3,270, and less than 0 of 10 midsize car configurations. The comparison covers all 130 rated midsize car configurations for MY2009, not weighted by sales.
Is the 2009 Cadillac STS-V different from the 2008 model?
No. EPA lists the same ratings for 2008 and 2009: 1 configuration rated 15 MPG combined. See the 2008 Cadillac STS-V for that year.