How big is the gas tank on a 2019 Subaru Outback?
The gas tank on the 2019 Subaru Outback holds 18.5 gallons (about 70 liters).
Capacity and consistency across trims
The 2019 Outback's 18.5-gallon capacity is standard across most trims. This size reflects Subaru's balance between cargo space, all-wheel-drive practicality, and driving-range needs for a wagon designed for longer trips and outdoor use.
What it means for range
Real-world range depends on engine choice and driving conditions. With typical highway driving and EPA-rated efficiency, you can expect roughly 500–600 miles on a full tank. In city driving, the range will be lower, closer to the lower end of that estimate.
Engine options in 2019
For US-market 2019 Outback models, the standard engine was the 2.5-liter four-cylinder. A larger 3.6-liter flat-six was not offered in the 2019 lineup in most markets; availability of the 3.6L ended earlier. The fuel tank capacity, 18.5 gallons, remains the same regardless of engine choice.
Summary
The 2019 Subaru Outback uses an 18.5-gallon gas tank (70 liters), a standard capacity that provides a practical driving range of about 500–600 miles per tank, depending on driving conditions and engine configuration.
