Subaru Outback Fuel Tank Capacity
How big is the gas tank on a 2027 Subaru Outback?
The 2027 Subaru Outback has a 18.5-gallon fuel tank, good for roughly 463 miles of range at 25 MPG combined.
Latest model year (2027):
The Subaru Outback holds 18.5 gallons of fuel. At 25 MPG combined that is roughly 463 miles of range on a full tank.
Subaru Outback Gas Tank — All Years
| Year | Tank Capacity | Optional Tank | Combined MPG | Est. Range |
|---|---|---|---|---|
| 2027 | 18.5 gal | — | 25 | 463 mi |
| 2026 | 18.5 gal | — | 25 | 463 mi |
| 2025 | 18.5 gal | — | 25 | 463 mi |
| 2024 | 18.5 gal | — | 25 | 463 mi |
| 2023 | 18.5 gal | — | 25 | 463 mi |
| 2022 | 18.5 gal | — | 26 | 481 mi |
| 2021 | 18.5 gal | — | 28 | 518 mi |
| 2020 | 18.5 gal | — | 28 | 518 mi |
| 2019 | 18.5 gal | — | 25 | 463 mi |
| 2018 | 18.5 gal | — | — | — |
Manufacturer specification data sourced from Manufacturer specifications, last verified August 12, 2026. Always confirm against the owner's manual or door-jamb placard before towing or buying tires — figures vary by cab, bed, axle ratio, and options.
Subaru Outback data analysis
Fuel tank: 18.5 gallons
The Subaru Outback holds 18.5 gallons (Standard). That is rank 41 of 51 vehicle we hold tank data fors here — bottom quartile. The cohort median is 21 gal, so this vehicle sits 2.5 gal below the middle of the field — a real deficit, not a rounding difference. Next rung up is the Ford Explorer at 18.6 gal, 0.1 gal clear of this one. Immediately behind: the Ford Ranger at 18 gal. Ford Edge matches it exactly — that figure is a segment convention, not an engineering ceiling.
How far that goes
Full-tank range works out at 407–537 miles on EPA combined figures (22–29 MPG across the configurations on file). On the highway cycle at 31 MPG the best version covers 574 miles between fills. Treat 366 miles as the working number. Cold weather, roof loads and a 75 mph cruise each cost 10–20% against the EPA figure. Annual fuel spend at 15,000 miles and $3.50/gal: $1,810, across about 28 tanks.
Configurations and caveats
10 configurations on file across 2018–2027. Four-wheel-drive versions occasionally carry a smaller tank than two-wheel-drive ones to clear the transfer case, so match the row to the drivetrain. Sources for these 10 rows: manufacturer filings, covering 10 model years.
How Subaru Outback fuel tank capacity varies
Across 10 configurations recorded for the 2018 through 2027 Subaru Outback, fuel tank capacity runs from 18.5 gallons to 18.5 gallons. The strongest figure belongs to the 2018 Subaru Outback (Standard) at 18.5 gallons, and the weakest to the 2027 car (Standard) at 18.5 gallons — a spread of 0%. The narrow spread means any year of the Subaru Outback in this table behaves much like the others, so you can shop on price, condition and mileage rather than chasing a particular model year.
What changed for 2027
Average fuel tank capacity for the 2027 Subaru Outback is 18.5 gallons, against 18.5 gallons for the 2026 car — it held flat. A carry-over year like this usually means no powertrain or structural change, so an older example is the cheaper way into the same specification.
Configurations behind these Subaru Outback numbers
The 2018 through 2027 Subaru Outback entries here span 10 model years of published measurements for this figure. 2027 is the busiest model year in the record with 1 separate measured configuration, which is why a single quoted fuel tank capacity figure for that year is rarely the one that matches the car in front of you. Match the row to the exact drivetrain, body style and engine on the window sticker or VIN before relying on the number, and use the comparison links below to see how those same configurations line up against rival models.
Frequently Asked Questions About Outback Gas Tank
How big is the Subaru Outback gas tank?
The Subaru Outback has a 18.5-gallon fuel tank. Capacity changed between generations — the table above lists it year by year.
How far can the Subaru Outback go on a full tank?
At roughly 26 MPG combined, a full 18.5-gallon tank is good for about 481 miles. Plan on refueling near 300 miles, since most fuel gauges read empty with 1–2 gallons still in the tank.
How much does it cost to fill up a Subaru Outback?
At $3.50 per gallon, filling the 18.5-gallon tank from empty costs about $65. Multiply the tank size by your local pump price for a current figure.