The Subaru Outback uses horizontally opposed boxer engines, and the oil grade depends on whether you have the naturally aspirated 2.5L or the turbocharged 2.4L. Most 2.5L Outbacks use 0W-20, while the turbo uses 5W-30. Here is the breakdown by engine and year.
| Engine / Years | Oil type | Capacity | Interval |
|---|---|---|---|
| 2.5L boxer 2013-2025 | 0W-20 synthetic | 4.4-4.8 qt | 6,000-7,500 mi |
| 2.4L turbo XT 2020-2025 | 5W-30 synthetic | 5.1 qt | 6,000-7,500 mi |
| 3.6L six-cyl 2010-2019 | 5W-30 synthetic | 6.9 qt | 6,000-7,500 mi |
| 2.5L boxer pre-2011 | 5W-30 | 4.4 qt | 3,750-7,500 mi |
Subaru specifies 0W-20 full synthetic for the 2.5L boxer four-cylinder used in most modern Outbacks. The 2.4L turbocharged boxer in the Outback XT uses 5W-30 full synthetic. The older 3.6L six-cylinder used 5W-30. Look for oil meeting API SP and ILSAC GF-6 for the 0W-20 applications.
Subaru boxer engines are known to consume some oil between changes, so check the level regularly and keep the correct grade on hand for top-ups.
The 2.5L boxer holds about 4.4 to 4.8 quarts with a filter change. The 2.4L turbo holds roughly 5.1 quarts. The older 3.6L held about 6.9 quarts. Always confirm on the dipstick, and note the boxer layout can make level checks touchy, so check on level ground.
The Outback uses a spin-on oil filter that is accessible from underneath, though the boxer layout means it sits in an unusual spot. Gather the correct grade of synthetic, a Subaru-compatible filter, the right drain-plug socket, and a crush washer. Reset any maintenance reminder through the dash after the change.
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