2011 Cadillac STS Gas Tank Size & Fuel Capacity
Fuel tank capacity
17.0gal · 64 L
The 2011 Cadillac STS has a fuel tank capacity of 17.0 gallons (64 liters) on every trim.
A full tank is good for roughly 459 highway miles or 306 miles around town, going by the EPA ratings.
17.0 gal · Smaller than 73% of 2011 models we list.
- By trim
- Gas cap & parts
- Fuel essentials
- Miles per tank
- Fill-up cost
- Other years
- Compared
- Pump & gauge parts
- FAQ
2011 Cadillac STS fuel tank capacity by trim
MPG and range are city / highway.
| Trim | Engine | Drive | Tank | MPG city / hwy | Range city / hwy | |
|---|---|---|---|---|---|---|
| V6 Luxury 4dr Sedan 3.6L 6cyl 6A · RWD MPG 18 / 27Range 306 / 459 mi | 3.6L 6cyl 6A | RWD | 17.0 gal64 L | 18 / 27 | 306 / 459 mi | |
| V6 Luxury Sport 4dr Sedan 3.6L 6cyl 6A · RWD MPG 18 / 27Range 306 / 459 mi | 3.6L 6cyl 6A | RWD | 17.0 gal64 L | 18 / 27 | 306 / 459 mi | |
| V6 Premium 4dr Sedan 3.6L 6cyl 6A · RWD MPG 18 / 27Range 306 / 459 mi | 3.6L 6cyl 6A | RWD | 17.0 gal64 L | 18 / 27 | 306 / 459 mi | |
| No trim matches all of these filters. | ||||||
Tank figures are the manufacturer's rated capacity, sorted smallest tank first. Range is tank size times EPA city or highway MPG.
How far a 2011 Cadillac STS goes on a tank
Gallons left and the distance they cover at each mark on the fuel gauge, at EPA city and highway mileage. At the combined rating of 21 MPG, a full 17.0-gallon tank covers about 357 miles.
| Gauge | Gallons | Highway miles | City miles |
|---|---|---|---|
| Full | 17.0 | 459 | 306 |
| 3/4 | 12.8 | 344 | 230 |
| 1/2 | 8.5 | 230 | 153 |
| 1/4 | 4.3 | 115 | 77 |
| 1/8 | 2.1 | 57 | 38 |
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 714 gallons, roughly 42 full tanks.
Fuel gauges aren't perfectly linear and the low-fuel light comes on with a few gallons still in the tank, so plan your stop before the last eighth.
- EPA combined
- 21 MPG
- Tailpipe CO2
- 423 g/mi
- Source
- EPA ratings
What it costs to fill up a 2011 Cadillac STS
$72.59 to fill the 17.0-gallon tank from empty with regular, at this week's US average of $4.27 a gallon.
| Tank | Fuel | US avg / gal | From empty | From 1/4 tank |
|---|---|---|---|---|
| 17.0 gal | Regular | $4.27 | $72.59 | $54.44 |
By region, 17.0-gallon tank
| Region | Regular / gal | Fill from empty |
|---|---|---|
| East Coast | $4.02 | $68.34 |
| Midwest | $4.27 | $72.59 |
| Gulf CoastLowest | $3.70 | $62.90 |
| Rocky Mountain | $4.46 | $75.82 |
| West Coast | $5.42 | $92.14 |
| CaliforniaHighest | $5.89 | $100.13 |
Prices: U.S. Energy Information Administration retail averages for the week of October 26, 2026. This week's prices by state and city.
Your own price
- 17.0-gallon tank$72.59
- A year of driving (15,000 mi)$3,050
Starts at the US average for regular; type in what your station charges. For other tank sizes, use the fill-up calculator.
STS tank size in other years
The 2011 STS uses the same 17.0 gal tank as every STS since 2005.
| Model year | Tank | Longest highway range |
|---|---|---|
| 2011 STS | 17.0 gal | 459 mi |
| 2010 STS | 17.0 gal | 459 mi |
| 2009 STS | 17.0 gal | 442 mi |
| 2008 STS | 17.0 gal | 442 mi |
| 2007 STS | 17.0 gal | 425 mi |
| 2006 STS | 17.0 gal | 425 mi |
2011 Cadillac STS vs similar 2011 sedans
The STS has the smallest tank of the seven 2011 sedans compared here: 17.0 gallons, against 21.1 for the Mercedes-Benz E-Class.
| 2011 model | Tank | Longest highway range |
|---|---|---|
| Mercedes-Benz E-Class | 17.4–21.1 gal | 696 mi |
| INFINITI M37 | 20.0 gal | 520 mi |
| Lexus GS 350 | 18.8 gal | 489 mi |
| Acura TL | 18.5 gal | 481 mi |
| Volvo S80 | 18.5 gal | 500 mi |
| Saab 9-5 | 18.5 gal | 611 mi |
| Cadillac STS | 17.0 gal | 459 mi |
Other 2011 sedans of a similar size, one model per brand.
2011 Cadillac STS fuel pump and gauge parts
These are the part numbers the makers list for the 2011 Cadillac STS. Check the fuel system recalls first: recall repairs are free.
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Frequently asked questions
What is the fuel tank capacity of the 2011 Cadillac STS?
The 2011 Cadillac STS holds 17.0 gallons (64 liters) on every trim we list.
How many gallons and liters does the 2011 Cadillac STS gas tank hold?
The 2011 Cadillac STS tank holds 64 liters, or 17.0 gallons in US gallons.
How far can a 2011 Cadillac STS go on a full tank?
About 459 miles on the highway and 306 miles in town, going from full to empty at its EPA ratings. Expect less in practice, since nobody runs the tank dry.
How many miles can a 2011 Cadillac STS go on a quarter tank?
About 115 highway miles or 77 in town from the 17.0-gallon tank, which has roughly 4.3 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
What gas does the 2011 Cadillac STS take?
Regular unleaded. The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 2011 Cadillac STS?
At the US average of $4.27 a gallon for regular (EIA, week of October 26, 2026), filling the 17.0-gallon tank from empty costs $72.59. It ranges from $62.90 in the Gulf Coast to $100.13 in California.
How much does a full tank of gas weigh in a 2011 Cadillac STS?
About 105 pounds for the 17.0-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2011 Cadillac STS have a bigger gas tank than the Acura TL?
No. The 2011 Acura TL holds up to 18.5 gallons; the 2011 Cadillac STS holds up to 17.0.
Sources
- Tank sizes: manufacturer-rated capacities from US-market specifications, checked against independent references. Updated October 2026.
- MPG and range: EPA ratings (fueleconomy.gov). Range is tank size times EPA MPG.
- Fuel prices: U.S. Energy Information Administration, week of October 26, 2026 (this week's prices).
Does your owner's manual say something different? Let us know and we'll fix it. More on how we check the numbers.