2024 Subaru Outback Fluid Specs

Quick Reference

Fluid	Type/Spec	Capacity
Engine Oil	SAE 0W-20 Synthetic, API SP or ILSAC GF-6A	4.8 US qt (4.5 L) for 2.5L / 5.1 US qt (4.8 L) for 2.4L Turbo
Engine Coolant	Subaru Super Coolant (Blue)	7.6 - 8.7 US qt (7.2 - 8.2 L)
Transmission Fluid	Subaru High-Torque CVT Fluid (TR-690) or Subaru CVT Fluid II (TR-580)	Verify in owner's manual
Front Differential	Subaru High Performance Gear Oil 75W-90	1.4 - 1.5 US qt (1.3 - 1.4 L)
Rear Differential	Subaru High Performance Gear Oil 75W-90	0.8 US qt (0.75 L)
Brake Fluid	DOT 3 or DOT 4	As required
Power Steering	N/A (Electric Power Steering)	N/A
Washer Fluid	Subaru Windshield Washer Fluid or equivalent	2.6 US qt (2.5 L)

Engine Oil

The 2024 Subaru Outback comes with two engine options: the naturally aspirated 2.5L FB25D and the turbocharged 2.4L FA24F. Both engines require SAE 0W-20 synthetic engine oil that meets the latest API SP or ILSAC GF-6A specification. These specifications ensure the oil provides the necessary protection against low-speed pre-ignition (LSPI), a phenomenon common in modern direct-injection turbocharged engines, while also offering excellent fuel economy and wear protection.

While many high-quality synthetic 0W-20 oils meet these specs, using the OEM Subaru Synthetic Motor Oil is always a safe bet. The 2.5L engine requires approximately 4.8 US quarts (4.5 liters) for a drain and fill, while the 2.4L turbo engine takes around 5.1 US quarts (4.8 liters). Always verify the level on the dipstick after filling.

Subaru recommends an oil change interval of 6,000 miles or 6 months, whichever comes first, under normal driving conditions. However, if you frequently drive in severe conditions—such as extreme temperatures, dusty environments, or short trips—you should consider a shorter interval.

Engine Coolant

Subaru uses a specific blue-colored, P-OAT (Phosphated Organic Acid Technology) coolant called Subaru Super Coolant. It is crucial to use only this type of coolant. Mixing it with other types, including universal or other "long-life" coolants, can lead to chemical reactions that diminish its protective properties, potentially causing corrosion and damage to the cooling system.

The cooling system capacity ranges from 7.6 to 8.7 US quarts (7.2 to 8.2 liters), depending on the engine and trim. The coolant comes pre-mixed 50/50 with deionized water and should not be diluted further. The factory fill is designed to last for 11 years or 137,500 miles, but subsequent changes should occur every 6 years or 75,000 miles.

Transmission Fluid

The 2024 Outback is equipped with a Lineartronic CVT (Continuously Variable Transmission). The specific fluid required depends on the transmission model, which is tied to the engine.

• Models with the 2.5L engine use the TR-580 transmission and require Subaru CVT Fluid II (K0425Y0711).
• Models with the 2.4L turbo engine use the high-torque TR-690 transmission and require Subaru High-Torque CVT Fluid (SOA427V1660).

Using the wrong fluid can and will cause catastrophic damage to the CVT. These are not interchangeable, and "universal" or "multi-vehicle" CVT fluids should never be used. Subaru considers this a "lifetime" fluid, but many technicians recommend a drain and fill between 60,000 and 100,000 miles to ensure longevity, especially if you tow or drive in mountainous terrain. This is not a simple DIY job, as it requires a specific filling procedure and temperature check, so it's best left to a professional.

Front & Rear Differential Fluid

All 2024 Outbacks are equipped with Subaru's Symmetrical All-Wheel Drive system, which includes a front and rear differential. Both differentials require Subaru High Performance Gear Oil 75W-90.

• The front differential capacity is approximately 1.4 - 1.5 US quarts (1.3 - 1.4 liters).
• The rear differential capacity is approximately 0.8 US quarts (0.75 liters).

There are no limited-slip additives required for the factory differentials. While Subaru does not specify a replacement interval in the normal maintenance schedule, it is best practice to inspect the fluid every 30,000 miles and replace it if it appears dirty or contaminated, or as a preventative measure every 60,000 miles.

Brake Fluid

The hydraulic brake system requires DOT 3 or DOT 4 brake fluid. While either is acceptable, DOT 4 has a higher boiling point, which can provide an extra margin of safety under heavy braking. Do not use DOT 5 fluid, as it is silicone-based and incompatible with the system.

Brake fluid is hygroscopic, meaning it absorbs moisture from the air over time. This moisture lowers the boiling point and can cause corrosion in the brake lines and calipers. For this reason, it should be replaced every 2-3 years or 30,000 miles, regardless of mileage.

Power Steering Fluid

The 2024 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 and fluid. Therefore, there is no power steering fluid to check or change.

Windshield Washer Fluid

Use any quality windshield washer fluid, such as the Subaru Windshield Washer Fluid, which contains a solvent to help break down road grime and bug splatter. In colder climates, use a fluid with a low freezing point to prevent damage to the reservoir and lines. The reservoir has a capacity of 2.6 US quarts (2.5 liters).

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