In 2017, the Subaru Legacy generally uses 0W-20 synthetic oil, with an oil capacity of about 4.7 quarts (including the filter).
Oil type and grade for the 2017 Legacy
The standard engine oil for most 2017 Legacy models is 0W-20 full-synthetic oil. It should meet API SN or newer and ILSAC GF-5 (and GF-6 when applicable). This grade is chosen to balance fuel efficiency with reliable performance in varying climates.
Engine options and considerations
Most 2017 Legacy vehicles use the 2.5-liter flat-four engine. If your model uses a different engine, such as a 3.6-liter option, it’s important to check the owner’s manual or consult a Subaru dealer for the exact grade and capacity, since variations can occur by market and trim. In general, 0W-20 synthetic is the recommended specification across common Legacy engines for that year.
Oil capacity and practical guidelines
The oil capacity is approximately 4.7 quarts (4.4 liters) including the filter. When performing a change or topping off, use a high-quality 0W-20 synthetic that meets API SN or newer and ILSAC GF-5 (or GF-6 as applicable). After adding oil, verify the level with the dipstick and run the engine briefly to ensure proper pressure and no leaks.
Summary
For the 2017 Subaru Legacy, the recommended oil is 0W-20 synthetic with a capacity around 4.7 quarts, though always verify the exact specification in your owner’s manual for your specific engine and market.