2023 Subaru Outback Coolant Capacity & Type
Essential information for maintaining your Subaru Outback's cooling system.
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The 2023 Subaru Outback holds approximately 8.2 to 8.7 quarts (7.8 to 8.2 liters) of coolant in its cooling system, depending on the engine. Properly maintaining your Outback's cooling system is crucial for its longevity and performance, especially given the boxer engine's unique thermal characteristics.
Quick Answer
- Total Cooling System Capacity:
- 2.5L H4 (Non-Turbo): 8.2 quarts (7.8 liters)
- 2.4L H4 (Turbo): 8.7 quarts (8.2 liters)
- OEM Coolant Specification: Subaru Super Coolant (Blue, HOAT - Hybrid Organic Acid Technology). This is a 50/50 prediluted coolant.
- Mix Ratio: 50/50 (Pre-mixed concentrate is not recommended for this vehicle without proper dilution to manufacturer specifications, always use the Subaru Super Coolant pre-mix or concentrate diluted with deionized water to 50/50).
Capacity by Engine Option
To ensure you have the correct amount of coolant, verify your engine type:
| Engine Type | Approximate Capacity (Quarts) | Approximate Capacity (Liters) |
|---|---|---|
| 2.5L DOHC Naturally Aspirated | 8.2 | 7.8 |
| 2.4L DOHC Turbocharged | 8.7 | 8.2 |
Flush Interval
Subaru recommends a specific maintenance schedule for its Super Coolant:
- Normal Duty: The initial coolant change is recommended at 137,500 miles (220,000 km) or 11 years, whichever comes first. After the initial change, subsequent changes are recommended every 75,000 miles (120,000 km) or 6 years.
- Severe Duty: If your driving conditions fall under "severe duty" (e.g., frequent towing, driving in extreme temperatures, dusty conditions, or stop-and-go traffic), it
More specs for the 2023 Subaru Outback
Oil Capacity & Filter
Capacity, weight, filter PN, drain plug torque, change interval.
Fluid Type Specs
Engine oil, coolant, ATF, diff, brake, PS, DEF — with OEM spec numbers.
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
2023 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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Values can vary by engine, trim and build date; check your VIN-specific service information. Updated 2026-06-22.