2011 Subaru Legacy Gas Tank Size & Fuel Capacity
Fuel tank capacity
18.5gal · 70 L
The 2011 Subaru Legacy has a fuel tank capacity of 18.5 gallons (70 liters) on every trim.
A full tank is good for roughly 463–574 highway miles or 333–426 miles around town, going by the EPA ratings.
18.5 gal · Smaller than 59% of 2011 models we list.
- By trim
- Gas cap & parts
- Fuel essentials
- Miles per tank
- Fill-up cost
- Other years
- Compared
- Fuel recalls
- Pump & gauge parts
- FAQ
2011 Subaru Legacy fuel tank capacity by trim
What changes the tank sizeTap an option to filter the table
- Engine
- no difference
All 9 trims
MPG and range are city / highway.
| Trim | Engine | Drive | Tank | Fuel | MPG city / hwy | Range city / hwy |
|---|---|---|---|---|---|---|
| 2.5GT Limited 4dr Sedan AWD 2.5L 4cyl Turbo 6M · AWD · Premium (required) MPG 18 / 25Range 333 / 463 mi | 2.5L 4cyl Turbo 6M | AWD | 18.5 gal70 L | Premiumrequired | 18 / 25 | 333 / 463 mi |
| 2.5i 4dr Sedan AWD 2.5L 4cyl 6M · AWD · Regular MPG 19 / 27Range 352 / 500 mi | 2.5L 4cyl 6M | AWD | 18.5 gal70 L | Regular | 19 / 27 | 352 / 500 mi |
| 2.5i 4dr Sedan AWD 2.5L 4cyl CVT · AWD · Regular MPG 23 / 31Range 426 / 574 mi | 2.5L 4cyl CVT | AWD | 18.5 gal70 L | Regular | 23 / 31 | 426 / 574 mi |
| 2.5i Limited 4dr Sedan AWD 2.5L 4cyl CVT · AWD · Regular MPG 23 / 31Range 426 / 574 mi | 2.5L 4cyl CVT | AWD | 18.5 gal70 L | Regular | 23 / 31 | 426 / 574 mi |
| 2.5i Premium 4dr Sedan AWD 2.5L 4cyl 6M · AWD · Regular MPG 19 / 27Range 352 / 500 mi | 2.5L 4cyl 6M | AWD | 18.5 gal70 L | Regular | 19 / 27 | 352 / 500 mi |
| 2.5i Premium 4dr Sedan AWD 2.5L 4cyl CVT · AWD · Regular MPG 23 / 31Range 426 / 574 mi | 2.5L 4cyl CVT | AWD | 18.5 gal70 L | Regular | 23 / 31 | 426 / 574 mi |
| 3.6R 4dr Sedan AWD 3.6L 6cyl 5A · AWD · Regular MPG 18 / 25Range 333 / 463 mi | 3.6L 6cyl 5A | AWD | 18.5 gal70 L | Regular | 18 / 25 | 333 / 463 mi |
| 3.6R Limited 4dr Sedan AWD 3.6L 6cyl 5A · AWD · Regular MPG 18 / 25Range 333 / 463 mi | 3.6L 6cyl 5A | AWD | 18.5 gal70 L | Regular | 18 / 25 | 333 / 463 mi |
| 3.6R Premium 4dr Sedan AWD 3.6L 6cyl 5A · AWD · Regular MPG 18 / 25Range 333 / 463 mi | 3.6L 6cyl 5A | AWD | 18.5 gal70 L | Regular | 18 / 25 | 333 / 463 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 Subaru Legacy 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 26 MPG, a full 18.5-gallon tank covers about 481 miles.
| Gauge | Gallons | Highway miles | City miles |
|---|---|---|---|
| Full | 18.5 | 574 | 426 |
| 3/4 | 13.9 | 430 | 319 |
| 1/2 | 9.3 | 287 | 213 |
| 1/4 | 4.6 | 143 | 106 |
| 1/8 | 2.3 | 72 | 53 |
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 577 gallons, roughly 31 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 Subaru Legacy
$78.99 to fill the 18.5-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 |
|---|---|---|---|---|
| 18.5 gal | Regular | $4.27 | $78.99 | $59.25 |
| 18.5 gal | Premium | $5.28 | $97.68 | $73.26 |
By region, 18.5-gallon tank
| Region | Regular / gal | Fill from empty |
|---|---|---|
| East Coast | $4.02 | $74.37 |
| Midwest | $4.27 | $78.99 |
| Gulf CoastLowest | $3.70 | $68.45 |
| Rocky Mountain | $4.46 | $82.51 |
| West Coast | $5.42 | $100.27 |
| CaliforniaHighest | $5.89 | $108.96 |
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
- 18.5-gallon tank$78.99
- A year of driving (15,000 mi)$2,463
Starts at the US average for regular; type in what your station charges. For other tank sizes, use the fill-up calculator.
Legacy tank size in other years
The 2011 Legacy uses the same 18.5 gal tank as the 2010 model.
| Model year | Tank | Longest highway range |
|---|---|---|
| 2016 Legacy | 18.5 gal | 666 mi |
| 2015 Legacy | 18.5 gal | 666 mi |
| 2014 Legacy | 18.5 gal | 592 mi |
| 2013 Legacy | 18.5 gal | 592 mi |
| 2012 Legacy | 18.5 gal | 574 mi |
| 2011 Legacy | 18.5 gal | 574 mi |
| 2010 Legacy | 18.5 gal | 574 mi |
| 2009 Legacy | 16.9 gal | 456 mi |
| 2008 Legacy | 16.9 gal | 456 mi |
| 2007 Legacy | 16.9 gal | 473 mi |
| 2006 Legacy | 16.9 gal | 456 mi |
- 2025
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2011 Subaru Legacy vs similar 2011 sedans
At 18.5 gallons, the Legacy's largest tank ranks second of the seven 2011 sedans compared here. The Nissan Altima Hybrid carries the most (20.0 gal) and the Dodge Avenger the least (16.9 gal).
| 2011 model | Tank | Longest highway range |
|---|---|---|
| Nissan Altima Hybrid | 20.0 gal | 660 mi |
| Subaru Legacy | 18.5 gal | 574 mi |
| Kia Optima | 17.2–18.5 gal | 671 mi |
| Mitsubishi Galant | 17.7 gal | 531 mi |
| Mercury Milan | 16.5–17.5 gal | 578 mi |
| Hyundai Sonata Hybrid | 17.2 gal | 671 mi |
| Dodge Avenger | 16.9 gal | 524 mi |
Other 2011 sedans of a similar size, one model per brand.
2011 Subaru Legacy fuel system recalls
None of the 16 recalls NHTSA lists for the 2011 Subaru Legacy involve the fuel system.
2011 Subaru Legacy fuel pump and gauge parts
NHTSA lists no fuel-system recall for the 2011 Subaru Legacy, so a failed pump or gauge is a normal repair. These are the part numbers the makers list for it.
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Frequently asked questions
What is the fuel tank capacity of the 2011 Subaru Legacy?
The 2011 Subaru Legacy holds 18.5 gallons (70 liters) on every trim we list.
How many gallons and liters does the 2011 Subaru Legacy gas tank hold?
The 2011 Subaru Legacy tank holds 70 liters, or 18.5 gallons in US gallons.
How far can a 2011 Subaru Legacy go on a full tank?
About 463–574 miles on the highway and 333–426 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 Subaru Legacy go on a quarter tank?
About 143 highway miles or 106 in town from the 18.5-gallon tank, which has roughly 4.6 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
What gas does the 2011 Subaru Legacy take?
Regular unleaded, or Premium unleaded (required), depending on the engine. The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 2011 Subaru Legacy?
At the US average of $4.27 a gallon for regular (EIA, week of October 26, 2026), filling the 18.5-gallon tank from empty costs $78.99. It ranges from $68.45 in the Gulf Coast to $108.96 in California.
How much does a full tank of gas weigh in a 2011 Subaru Legacy?
About 115 pounds for the 18.5-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2011 Subaru Legacy have a bigger gas tank than the Hyundai Sonata Hybrid?
Yes. The 2011 Subaru Legacy holds up to 18.5 gallons; the 2011 Hyundai Sonata Hybrid holds up to 17.2.
Has the 2011 Subaru Legacy had a fuel pump or fuel system recall?
No. None of the 16 recalls NHTSA lists for the 2011 Subaru Legacy involve the fuel system.
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).
- Recalls: NHTSA recall database (Subaru fuel system recalls).
Does your owner's manual say something different? Let us know and we'll fix it. More on how we check the numbers.