How big is a 2017 Subaru Legacy gas tank?
The 2017 Subaru Legacy’s fuel tank capacity is 18.5 gallons (70 liters). This capacity applies to the common Legacy trims for the model year, allowing for about a full range before needing a refill.
In this article, we verify the official tank size, note any trim-specific nuances, and explain how this size affects refueling and driving expectations.
Tank capacity by trim
The following breakdown reflects the official fuel-tank capacity commonly listed for the 2017 Legacy in the U.S. market, covering the main trims.
- 2.5i (with CVT): 18.5 gallons (70 liters)
- 3.6R: 18.5 gallons (70 liters)
Across the typical 2017 Legacy lineup, the fuel tank size is consistent at about 18.5 gallons, which informs planning for long trips and refueling stops.
Notes and practical considerations
Fuel tank capacity is a fixed specification. Real-world usable fuel may be slightly lower due to reserve fuel and tank design, but 18.5 gallons is the standard spec for the 2017 Legacy in most markets.
Summary
Summary: The 2017 Subaru Legacy uses an 18.5-gallon (70-liter) fuel tank across its common trims, a size that supports relatively wide-range driving before refueling is needed.
What year was bad for Subaru Legacy?
Years to avoid for the Subaru Legacy include 2010–2014, primarily due to transmission issues and headlight problems, and 2005–2009, which are known for head gasket and other engine-related issues. Other problematic years include 2011 for its headlights and 2018 for infotainment problems.
Subaru Legacy years to avoid
- 2010–2014: These years can have issues with the continuously variable transmission (CVT), which can cause hesitation, shuddering, or stalling. The 2011 model year is also notorious for headlights burning out very quickly.
- 2005–2009: These models can be prone to head gasket failure, especially on the 2.5L engine, leading to coolant and oil leaks. Other problems can include catalytic converter and rear hub failures.
- 2018: This model year has been associated with infotainment system glitches, such as the display freezing or refusing to shut down.
- Other years:
- 2000–2006: Reported issues with faulty oxygen sensors.
- 2011–2012: Have been cited for frequent headlight burnout.
- 2021–2023: Recall issued for a transmission parking rod issue.
- 2023: Recalled for display screen issues and other electronic problems.
How many gallons of gas does a 2017 Subaru Legacy hold?
The 2017 Subaru Legacy has a fuel tank capacity of 18.5 gallons, regardless of the engine size. This is consistent across different trims, such as the 2.5i and the 3.6R.
- Fuel Capacity: 18.5 gallons
- Engine Size: The tank size is 18.5 gallons for both the 2.5i and 3.6R models.
Can a Subaru Legacy last 300,000 miles?
Subaru engines are renowned for their reliability and longevity, often lasting between 200,000 and 300,000 miles with proper maintenance.
How big is the gas tank on a 2017 Subaru?
18.5 gal
Fuel & MPG
462.5/592.0 mi. 18.5 gal.
