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What oil does a 2021 Subaru Outback (2.5L FB25 (4-cyl boxer)) take?

Subaru Outback · US market

We have a provisional entry for the 2021 Subaru Outback (2.5L FB25 (4-cyl boxer)), but it is not yet verified against the owner's manual. Treat the values below as a starting point only and confirm in your manual before buying oil.

Recommended viscosity
0W-20
Required specification
API SP / ILSAC GF-6A
Oil capacity
4.8 quarts (with filter)
Oil filter
Subaru 15208AA15A (or equivalent)
Low confidence · verified June 22, 2026

Source: SAMPLE SEED — verify against the official Subaru owner's manual before publishing. Verification status: Provisional. How we source data · Find the manual

Oil-change kit checklist

2021 Subaru Outback oil-change kit

Data status: Provisional. Use this as a prep list only; the owner's manual wins.

Required

  • Owner's manual page for the exact engine and US market
  • 0W-20 oil, only if the manual confirms this grade
  • API SP / ILSAC GF-6A specification or approval on the bottle label
  • 4.8 qt oil capacity with filter, confirmed before filling
  • Subaru 15208AA15A (or equivalent) or an explicitly equivalent oil filter

Recommended

  • New drain plug washer or gasket when the manual/service procedure calls for it
  • Drain pan, funnel, gloves, rags, and safe used-oil container
  • Torque specification for the drain plug if you are doing the work yourself
  • Receipt, mileage, date, and oil label/spec photo for your records

Optional

  • Oil filter wrench that fits your exact filter location
  • Shop towels or absorbent mat
  • Reminder entry for the next interval

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