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.
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Front differential
Gear oil spec
API GL-5 gear oil
Front differential gear oil (AT/CVT models). AT: 1.5 US qt (1.4 L); CVT: 1.43 US qt (1.35 L). Indicated quantity is a guideline; check level after refill.
Spec from the OEM (oem manual).
Capacity
1.5 qt
Confirm against your manual
Rear differential
Gear oil spec
API GL-5 gear oil
Rear differential gear oil. No oil level gauge — consult the Subaru-recommended procedure.
Spec from the OEM (oem manual).
Capacity
0.8 qt
Confirm against your manual
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.
