Skip to content
CarCareTruth

2015-2019 Subaru Outback differential fluid & capacity

The Outback has more than one differential, and they don't all take the same fluid. Each axle's exact gear oil spec and capacity is below, plus where to buy it.

Affiliate disclosure: CarCareTruth is reader-supported. As an Amazon Associate I earn from qualifying purchases. We may also earn commissions from other retailers linked on this page, at no extra cost to you. Affiliate revenue never influences our scores or rankings. Full disclosure

Front differential

Gear oil spec

API GL-5 75W-90

Spec from the OEM (oem manual, blauparts) · checked Jun 2026.

Capacity

1.3 qt

Verified · 2 sources

Find API GL-5 75W-90 on Amazon
Where this came from
  • 2020 Subaru Outback Owner's Manual — 12-2 Front Differential and Rear Differential Gear Oil, p.526 — source
  • Blauparts — Subaru Outback Front & Rear Differential Fluid Kit (front capacity) — source

Rear differential

Gear oil spec

API GL-5 75W-90

Spec from the OEM (oem manual, blauparts) · checked Jun 2026.

Capacity

0.8 qt

Verified · 2 sources

Find API GL-5 75W-90 on Amazon
Where this came from
  • 2020 Subaru Outback Owner's Manual — 12-2 Front Differential and Rear Differential Gear Oil, p.526 — source
  • Blauparts — Subaru Outback Front & Rear Differential Fluid Kit (rear capacity) — source

Spec anchored to the OEM owner's manual; the capacity, when it carries the verified badge, is cross-checked against an independent source. Never changed by what an affiliate link pays us. Your owner's manual is always the final word — and if your axle has a locker or an option package, double-check the capacity for your exact build.