How big is a Subaru Legacy tank?
The Subaru Legacy typically has a fuel tank capacity of 16.9 gallons (64 liters). A smaller number of older trims list about 16.6 gallons (63 liters). For any specific vehicle, verify the exact figure in the owner's manual or on the window sticker.
What the tank size means for you
Tank size directly affects how far you can travel between fill-ups, and it pairs with fuel economy to determine overall driving range. In the Legacy, the common capacity combines with the model’s mpg figures to estimate how many miles you can cover on a full tank.
Common capacities across Legacy generations
Below is a quick reference to the two most frequently cited capacities that appear in official documentation and owner reports.
- 16.9 gallons (64 liters) — standard for most current Legacy models (and many earlier ones).
- 16.6 gallons (63 liters) — reported for a subset of older model years and trims.
When shopping for a used Legacy, confirm the exact tank capacity for that specific model year by checking the owner's manual, window sticker, or Subaru’s official brochure.
Practical implications: estimating range
To estimate driving range, multiply the tank capacity by the vehicle’s average miles per gallon (mpg). For example, at a combined 28 mpg, a 16.9-gallon tank yields roughly 474 miles before refueling; at 32 mpg, about 541 miles. Real-world range depends on driving conditions, terrain, and load.
Summary
The Subaru Legacy generally uses a 16.9-gallon (64-liter) fuel tank, with occasional reports of 16.6 gallons (63 liters) on certain older trims. Always verify the exact specification for the model year you’re considering.
