2015 Subaru Outback Gas Tank Size & Fuel Capacity
Fuel tank capacity
18.5gal · 70 L
The 2015 Subaru Outback has a fuel tank capacity of 18.5 gallons (70 liters) on every trim.
A full tank is good for roughly 500–611 highway miles or 370–463 miles around town, going by the EPA ratings.
18.5 gal · Smaller than 54% of 2015 models we list.
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2015 Subaru Outback fuel tank capacity by trim
What changes the tank sizeTap an option to filter the table
- Engine
- no difference
All 7 trims
MPG and range are city / highway.
| Trim | Engine | Drive | Tank | MPG city / hwy | Range city / hwy | |
|---|---|---|---|---|---|---|
| 2.5i 4dr SUV AWD 2.5L 4cyl CVT · AWD MPG 25 / 33Range 463 / 611 mi | 2.5L 4cyl CVT | AWD | 18.5 gal70 L | 25 / 33 | 463 / 611 mi | |
| 2.5i Limited 4dr SUV AWD 2.5L 4cyl CVT · AWD MPG 25 / 33Range 463 / 611 mi | 2.5L 4cyl CVT | AWD | 18.5 gal70 L | 25 / 33 | 463 / 611 mi | |
| 2.5i Limited PZEV 4dr SUV AWD 2.5L 4cyl CVT · AWD MPG 25 / 33Range 463 / 611 mi | 2.5L 4cyl CVT | AWD | 18.5 gal70 L | 25 / 33 | 463 / 611 mi | |
| 2.5i PZEV 4dr SUV AWD 2.5L 4cyl CVT · AWD MPG 25 / 33Range 463 / 611 mi | 2.5L 4cyl CVT | AWD | 18.5 gal70 L | 25 / 33 | 463 / 611 mi | |
| 2.5i Premium 4dr SUV AWD 2.5L 4cyl CVT · AWD MPG 25 / 33Range 463 / 611 mi | 2.5L 4cyl CVT | AWD | 18.5 gal70 L | 25 / 33 | 463 / 611 mi | |
| 2.5i Premium PZEV 4dr SUV AWD 2.5L 4cyl CVT · AWD MPG 25 / 33Range 463 / 611 mi | 2.5L 4cyl CVT | AWD | 18.5 gal70 L | 25 / 33 | 463 / 611 mi | |
| 3.6R Limited 4dr SUV AWD 3.6L 6cyl CVT · AWD MPG 20 / 27Range 370 / 500 mi | 3.6L 6cyl CVT | AWD | 18.5 gal70 L | 20 / 27 | 370 / 500 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 (worked out from the rated MPG where the EPA range wasn't published).
How far a 2015 Subaru Outback 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 28 MPG, a full 18.5-gallon tank covers about 518 miles.
| Gauge | Gallons | Highway miles | City miles |
|---|---|---|---|
| Full | 18.5 | 611 | 463 |
| 3/4 | 13.9 | 458 | 347 |
| 1/2 | 9.3 | 305 | 231 |
| 1/4 | 4.6 | 153 | 116 |
| 1/8 | 2.3 | 76 | 58 |
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 536 gallons, roughly 29 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
- 22 MPG
- Tailpipe CO2
- 398 g/mi
- EPA greenhouse score
- 5 of 10
- Source
- EPA ratings
What it costs to fill up a 2015 Subaru Outback
$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 |
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)$2,287
Starts at the US average for regular; type in what your station charges. For other tank sizes, use the fill-up calculator.
Outback tank size in other years
The 2015 Outback uses the same 18.5 gal tank as every Outback since 2010.
| Model year | Tank | Longest highway range |
|---|---|---|
| 2020 Outback | 18.5 gal | 611 mi |
| 2019 Outback | 18.5 gal | 592 mi |
| 2018 Outback | 18.5 gal | 592 mi |
| 2017 Outback | 18.5 gal | 592 mi |
| 2016 Outback | 18.5 gal | 611 mi |
| 2015 Outback | 18.5 gal | 611 mi |
| 2014 Outback | 18.5 gal | 555 mi |
| 2013 Outback | 18.5 gal | 555 mi |
| 2012 Outback | 18.5 gal | 537 mi |
| 2011 Outback | 18.5 gal | 537 mi |
| 2010 Outback | 18.5 gal | 537 mi |
- 2026
- 2025
- 2024
- 2023
- 2022
- 2021
- 2020
- 2019
- 2018
- 2017
- 2016
- 2015
- 2014
- 2013
- 2012
- 2011
- 2010
- 2009
- 2008
- 2007
- 2006
- 2005
- 2004
- 2003
- 2002
- 2001
- 2000
2015 Subaru Outback vs similar 2015 SUVs
At 18.5 gallons, the Outback's largest tank ranks second of the seven 2015 SUVs compared here. The Chevrolet Equinox carries the most (18.8 gal) and the Nissan Rogue the least (14.5 gal).
| 2015 model | Tank | Longest highway range |
|---|---|---|
| Chevrolet Equinox | 18.8 gal | 602 mi |
| Subaru Outback | 18.5 gal | 611 mi |
| GMC Terrain | 18.0 gal | 576 mi |
| Hyundai Santa Fe Sport | 17.4 gal | 470 mi |
| Kia Sorento | 17.4 gal | 470 mi |
| Mitsubishi Outlander | 15.8–16.6 gal | 515 mi |
| Nissan Rogue | 14.5 gal | 479 mi |
Other 2015 SUVs of a similar size, one model per brand.
2015 Subaru Outback fuel system recalls
None of the 5 recalls NHTSA lists for the 2015 Subaru Outback involve the fuel system.
Frequently asked questions
What is the fuel tank capacity of the 2015 Subaru Outback?
The 2015 Subaru Outback holds 18.5 gallons (70 liters) on every trim we list.
How many gallons and liters does the 2015 Subaru Outback gas tank hold?
The 2015 Subaru Outback tank holds 70 liters, or 18.5 gallons in US gallons.
How far can a 2015 Subaru Outback go on a full tank?
About 500–611 miles on the highway and 370–463 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 2015 Subaru Outback go on a quarter tank?
About 153 highway miles or 116 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 2015 Subaru Outback take?
Regular unleaded. The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 2015 Subaru Outback?
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 2015 Subaru Outback?
About 115 pounds for the 18.5-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2015 Subaru Outback have a bigger gas tank than the Hyundai Santa Fe Sport?
Yes. The 2015 Subaru Outback holds up to 18.5 gallons; the 2015 Hyundai Santa Fe Sport holds up to 17.4.
Has the 2015 Subaru Outback had a fuel pump or fuel system recall?
No. None of the 5 recalls NHTSA lists for the 2015 Subaru Outback 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.