2021 Subaru Outback Oil Capacity & Filter
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The 2021 Subaru Outback takes 4.8 quarts (4.5 liters) of 0W-20 synthetic oil for both the 2.5L naturally aspirated and the 2.4L turbocharged engines.
Quick answer
- Oil Capacity: 4.8 US Quarts (4.5 Liters)
- Recommended Oil Weight: 0W-20 (Synthetic)
- Oil Spec: API SN PLUS or higher, or ILSAC GF-6
- **Oil Filter (2.5L & 2.4L Turbo):
- OEM:** Subaru PN 15208AA170 (or equivalent new PN 15208AA17A)
- FRAM: PH6607, XG6607 (Ultra Synthetic)
- WIX: 57055
- Mobil 1: M1-108A
Capacity by engine option
The 2021 Subaru Outback offers two engine options, both sharing the same oil capacity and recommendations:
| Engine | Oil Capacity | Oil Type |
|---|---|---|
| 2.5L Flat-4 (Non-Turbo) | 4.8 Quarts | 0W-20 Synthetic |
| 2.4L Flat-4 (Turbo) | 4.8 Quarts | 0W-20 Synthetic |
Oil change interval
Subaru recommends the following oil change intervals for the 2021 Outback:
- Normal Duty: Every 6,000 miles or 6 months, whichever comes first.
- Severe Duty: Every 3,000 miles or 6 months, whichever comes first. This applies if you frequently drive short distances, in dusty conditions, extreme temperatures, or tow a trailer.
Regular oil changes are crucial for the longevity of your Outback's engine, especially considering the Boxer engine's design and the prevalence of direct injection in the 2.4L turbo.
Drain plug torque
The oil drain plug on the 2021 Subaru Outback should be torqued to 31 ± 3.6 ft-lb (42 ± 5 N·m). Always use a new crush washer with each oil change to ensure a proper seal and prevent leaks. The OEM crush washer part number is typically 803916010, though it
More specs for the 2021 Subaru Outback
Fluid Type Specs
Engine oil, coolant, ATF, diff, brake, PS, DEF — with OEM spec numbers.
Coolant Capacity & Type
Total system capacity, OEM coolant spec, flush interval, bleed tips.
Transmission Fluid & Service
Trans model, fluid spec, capacity, filter PN, service interval.
Torque Specifications
Lug nuts, drain plug, caliper, axle nut, plug, key fasteners.
Brake Pad & Rotor Specs
Pad PNs, rotor size, min thickness, caliper torque.
Tire Size & Pressure
OEM size, cold psi, bolt pattern, wheel size, TPMS.
Battery Size & Group
Group size, CCA, AGM/flooded, dimensions, reset note.
A/C Refrigerant & Oil
R-134a or R-1234yf, charge oz, PAG oil spec.
Bulb Sizes (Headlight, Tail, Fog)
Headlight, fog, tail, turn, reverse, interior.
Factory Maintenance Schedule
Service intervals by mileage, severe-duty notes, known issues.
Towing Capacity & Payload
Max tow, payload, GVWR/GCWR, hitch class by trim.
Fuse Box Diagram & Amperage
Fuse box locations, layout, amps, and what each fuse controls.
Serpentine Belt Routing & Length
Belt routing, length, rib count, OEM + aftermarket PNs.
Wheel Alignment Specifications
Camber, caster, toe ranges (front & rear), adjustability notes.
Paint Color Codes
All factory colors with paint codes, sticker location, touch-up tips.
Wiper Blade Sizes
Driver/passenger/rear blade size, attachment, OEM + cross-refs.
Spark Plug Type & Gap
Plug PN, gap, torque, interval by engine.
Transmission & Axle Gear Ratios
Trans gear ratios, axle ratios, RPO codes, tow vs MPG impact.
Key Fob Programming
DIY programming steps, FCC ID, fob PN, battery, transponder.
Same spec — other model years
Maintenance & repair guides
2021 Subaru Outback Maintenance Schedule →
Available maintenance guidance; confirm the manufacturer schedule.
Repair planning references →
Plan the scope of work; detailed procedures need configuration-matched evidence.
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