How big is the gas tank in a 2017 Subaru Outback?
The 2017 Subaru Outback is equipped with an 18.5-gallon fuel tank (about 70 liters). This capacity is standard across the lineup for that model year.
What the capacity means for range and daily use
With an 18.5-gallon tank, the Outback can cover a substantial distance between fill-ups, though the exact range depends on driving conditions and fuel economy. For models from this era, drivers typically see mid- to high-20s miles per gallon in combined driving, so a full tank translates to several hundred miles of travel before refueling is needed.
Trims and regional notes
Across the 2017 Outback trims—whether in the United States or Canada—the fuel tank size remains consistent at 18.5 gallons (70 liters). While exact mpg can vary by drivetrain and environment, the capacity itself does not change by trim.
Summary
In short, the gas tank on a 2017 Subaru Outback holds 18.5 gallons (approximately 70 liters). This fixed capacity provides a generous driving range, with actual miles per tank influenced by engine choice, transmission, and driving style. For precise figures for your exact build, consult the door jamb sticker or the owner's manual.
