The 2017 Subaru Legacy with the 2.5 L engine takes about 5.1 quarts of engine oil when you perform a full oil change with a new filter; about 4.8 quarts if you do not replace the filter. This article explains the exact capacity and related oil guidance.
Oil capacity for the 2.5 L engine
The total oil capacity depends on whether you change the oil filter during the service. Below are the typical figures you’ll encounter when planning an oil change.
- 5.1 quarts (approximately 4.8 liters) of engine oil when performing a full oil change with a new filter
- 4.8 quarts (approximately 4.6 liters) if you do not replace the oil filter during the change
In practice, most owners change the filter and fill to the full 5.1-quart specification, then check the level with the dipstick and top off if needed. Always verify the exact figure against your owner's manual for your region.
Recommended oil type and maintenance notes
Choosing the right oil and following recommended maintenance helps protect the engine over time. The following guidelines reflect common specifications for the 2.5 L engine in this model year, but you should confirm with your manual or dealer for regional variations.
- Viscosity: 0W-20 full synthetic oil is commonly recommended for the 2.5 L engine; check your owner’s manual or Subaru-approved specs for your region
- Oil quality: use a Subaru-approved synthetic oil to maintain warranty and performance
- Change interval: many owners follow about 7,500 miles (12,000 kilometers) under normal driving conditions, with shorter intervals under severe driving conditions or if advised by the OLM (Oil Life Monitor)
Keeping to the recommended oil type and change intervals helps preserve engine longevity and optimal performance.
Summary
For the 2017 Subaru Legacy 2.5 L, plan on about 5.1 quarts of oil for a standard change with a new filter (4.8 quarts if you don’t change the filter). Use 0W-20 synthetic oil as a common specification, confirm exact requirements in your manual, and follow the recommended maintenance intervals to keep the engine running smoothly.
What oil should a Subaru Legacy 2.5 take?
From 2013 onward, most 2.5L non-turbo Legacy models specify 0W-20 full-synthetic. If your Legacy is a 6-cylinder 3.6R (2010–2019 availability), Subaru specifies 5W-30 synthetic.
What kind of oil does a 2017 Subaru 2.5 take?
5W-30
2.5L 4-cylinder engine (EJ25):
Recommended oil: 5W-30 conventional or synthetic oil.
Does a 2017 Subaru Legacy take synthetic oil?
For example, if you have a Subaru Legacy produced between 2013 and 2021, your vehicle will need 0W-20 synthetic oil. While the 2005-2010 models use synthetic5W-30. You'll also notice variations in the oil type depending on engine types—for instance, a Legacy with a 6-cylinder engine might use 5W-30 instead of 0W-20.
Do all subarus take 0W-20?
Most new Subaru vehicles require synthetic oil with a viscosity rating of 0W-20. However, the correct Subaru oil type varies depending on the model year, so always consult your owner's manual for the most accurate information. Next, let's compare synthetic vs. conventional oil for Subaru vehicles.