2019 Subaru Outback Fluid Specs

Quick Reference

Fluid	Type/Spec	Capacity
Engine Oil	SAE 0W-20, API SN or ILSAC GF-5	5.1 quarts (4.8 liters)
Engine Coolant	Subaru Super Coolant (Blue)	8.6 - 9.0 quarts (8.1 - 8.5 liters)
Transmission Fluid	Subaru CVT Fluid for TR580	Varies (verify with service manual)
Front Differential	SAE 75W-90 Gear Oil	1.4 quarts (1.3 liters)
Rear Differential	SAE 75W-90 Gear Oil	0.8 quarts (0.75 liters)
Brake Fluid	DOT 3 or DOT 4	As needed
Power Steering Fluid	N/A (Electric Power Steering)	N/A
Washer Fluid	-	1.0 gallon (3.8 liters)

Engine Oil

Type/Spec: SAE 0W-20, API SN or ILSAC GF-5

Capacity: 5.1 quarts (4.8 liters) with filter change

The 2.5L FB25 engine in the 2019 Subaru Outback is designed to use a low-viscosity 0W-20 synthetic oil. This specific weight is crucial for maintaining proper fuel economy and ensuring oil flows quickly on cold starts to protect internal components. The oil must meet either API Service SN or ILSAC GF-5 specifications. While newer specifications like API SP and ILSAC GF-6A are backward-compatible and offer improved protection, the original recommendation is SN/GF-5. Always use a quality synthetic oil and a new crush washer for the drain plug with every change to prevent leaks. The recommended service interval is every 6,000 miles or 6 months, whichever comes first.

Engine Coolant

Type/Spec: Subaru Super Coolant (Blue)

Capacity: 8.6 - 9.0 quarts (8.1 - 8.5 liters)

Subaru uses a specific blue-colored, phosphate-based organic acid technology (P-OAT) coolant known as "Subaru Super Coolant." It is crucial to use only this specific formulation. Do not mix it with other coolant types (like green IAT or orange OAT/HOAT) as this can cause gelling, leading to blockages in the radiator, heater core, and coolant passages, which can cause severe engine damage. Never use "universal" or "all-makes-all-models" coolants. The factory coolant is pre-mixed 50/50 with deionized water and should not be diluted further. The first coolant change is recommended at 11 years or 137,500 miles, with subsequent changes every 6 years or 75,000 miles.

Transmission Fluid

Type/Spec: Subaru CVT Fluid for TR580

Capacity: Varies

All 2019 Outbacks are equipped with a Lineartronic Continuously Variable Transmission (CVT). These transmissions are highly sensitive to fluid type and require a specific fluid, typically Subaru High Torque CVT Fluid for the TR580 model transmission. Using any other type of ATF or a "universal" CVT fluid can and will cause irreparable damage to the transmission's belt and pulleys. Fluid changes for CVTs are a complex topic. While Subaru has marketed the fluid as "lifetime," most technicians recommend fluid changes at regular intervals (typically 60,000 to 100,000 miles) to extend the life of the unit, especially under severe driving conditions. A "drain and fill" only replaces a portion of the fluid, so a full fluid exchange using specialized equipment is recommended. This service should be performed by a qualified technician familiar with Subaru CVTs.

Front & Rear Differential

Front Differential

Type/Spec: SAE 75W-90 Gear Oil

Capacity: 1.4 quarts (1.3 liters)

Rear Differential

Type/Spec: SAE 75W-90 Gear Oil

Capacity: 0.8 quarts (0.75 liters)

The front and rear differentials on the 2019 Outback use a conventional 75W-90 weight gear oil. It is important to use a high-quality fluid that meets API GL-5 specifications. The front differential is a separate reservoir from the CVT. The fluid in both differentials should be inspected at regular service intervals and changed every 30,000 to 60,000 miles, or more frequently if the vehicle is used for towing or in harsh conditions. Ignoring differential fluid can lead to accelerated wear of the ring and pinion gears, resulting in noise and eventual failure.

Brake Fluid

Type/Spec: DOT 3 or DOT 4

Capacity: As needed

Subaru specifies the use of either DOT 3 or DOT 4 brake fluid. The two are compatible and can be mixed, though DOT 4 has a higher boiling point, which is beneficial for performance driving or towing. Brake fluid is hygroscopic, meaning it absorbs moisture from the air over time. This moisture lowers the boiling point of the fluid, which can lead to a "spongy" pedal feel and reduced braking performance. It can also cause internal corrosion in the brake lines and calipers. For these reasons, it is recommended to flush the entire brake system with fresh fluid every 2-3 years, regardless of mileage.

Power Steering Fluid

Type/Spec: N/A

Capacity: N/A

The 2019 Subaru Outback is equipped with an Electric Power Steering (EPS) system. This system uses an electric motor to provide steering assistance instead of a hydraulic pump, lines, and fluid. Therefore, there is no power steering fluid to check or change.

Washer Fluid

Type/Spec: N/A

Capacity: 1.0 gallon (3.8 liters)

Use any quality windshield washer fluid. In colder climates, use a fluid with a low freezing point to prevent damage to the washer pump and lines.

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Disclaimer: The fluid specifications and capacities listed above are for the 2019 Subaru Outback. While we strive for accuracy, specifications can vary based on production date, trim level, and other factors. Always verify specifications in your owner's manual or with OEM service information before adding or changing any fluids.

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