2019 Toyota Highlander Fluid Specs & Capacities

As an ASE-certified master technician, I know that using the correct fluids is critical to the longevity and performance of your 2019 Toyota Highlander. This guide provides a comprehensive list of all factory-specified fluids, capacities, and vital service information. Using the right product ensures your Highlander runs as designed and helps you avoid costly repairs down the road.

Quick Reference

Fluid	Type/Spec	Capacity
Engine Oil	SAE 0W-20 (API SN/SN PLUS/SP or ILSAC GF-5/GF-6A)	6.4 qt (3.5L V6), 4.8 qt (2.7L I4)
Engine Coolant	Toyota Super Long Life Coolant (Pink)	10.1 - 11.2 qt (V6), 7.2 - 7.8 qt (I4)
Transmission Fluid	Toyota Genuine ATF WS	~11 qt (total), 3.5 qt (drain/fill)
Transfer Case Fluid	Toyota Genuine Differential Gear Oil LT 75W-85 GL-5	0.9 qt (AWD Models)
Front Differential Fluid	See Transfer Case Fluid	See Transfer Case Fluid
Rear Differential Fluid	Toyota Genuine Differential Gear Oil LT 75W-85 GL-5	0.5 qt (AWD Models)
Brake Fluid	DOT 3 or DOT 4	As needed
Power Steering Fluid	Electric Power Steering (EPS) - No Fluid	N/A
Windshield Washer Fluid	High-quality solvent	~4.8 qt

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Engine Oil

Specification: API SN/SN PLUS/SP, ILSAC GF-5/GF-6A Viscosity: SAE 0W-20 Capacity: 6.4 quarts (3.5L 2GR-FKS V6), 4.8 quarts (2.7L 1AR-FE I4)

The 2019 Highlander's advanced engine designs require a high-quality, low-viscosity synthetic oil. SAE 0W-20 is the only approved grade. Using a heavier oil (like 5W-30) can impede the function of the VVT-i (Variable Valve Timing with intelligence) system and lead to reduced fuel economy and engine performance.

Always look for the API "starburst" and "donut" symbols on the bottle, ensuring the oil is certified SN PLUS or the newer SP and ILSAC GF-6A standards. These oils offer superior protection against low-speed pre-ignition (LSPI), a phenomenon common in modern direct-injection engines. While many quality aftermarket brands meet these specs, you can never go wrong with Toyota Genuine Motor Oil.

Intervals are typically 10,000 miles or 12 months, but always consult your owner's manual and vehicle maintenance monitor if equipped. If you frequently drive in severe conditions (short trips, dusty roads, towing), a 5,000-mile interval is recommended.

Engine Coolant

Specification: Toyota Super Long Life Coolant (SLLC) Type: P-HOAT (Phosphated Hybrid Organic Acid Technology) Color: Pink Capacity: 10.1 - 11.2 quarts (V6), 7.2 - 7.8 quarts (I4)

Toyota uses a specific "Pink" coolant known as Super Long Life Coolant. It is a non-silicate, non-amine, non-nitrite, and non-borate formula with a long-chain organic acid. Critically, it is a P-HOAT coolant, which is not the same as the OAT or HOAT coolants used by many American and European manufacturers.

Never mix coolants. Do not add green, orange, yellow, or "universal" coolant to your Highlander's cooling system. Doing so can cause the coolant to gel, leading to blockages in the radiator, heater core, and engine passages, resulting in catastrophic overheating. If you need to top off, use only Toyota SLLC Pink or a compatible aftermarket P-HOAT coolant explicitly designed for Asian vehicles. The initial factory fill is good for 10 years or 100,000 miles; subsequent changes are recommended every 5 years or 50,000 miles.

Transmission Fluid

Specification: Toyota Genuine ATF WS (World Standard) Capacity: Approximately 11 quarts (total fill), 3.5 quarts (drain and fill)

The Highlander is equipped with a sealed transmission that does not have a traditional dipstick. The fluid is considered "lifetime," but many technicians recommend a drain and fill every 60,000 miles for optimal longevity. This is especially true if you tow or drive in mountainous terrain.

There is no substitute for Toyota Genuine ATF WS. Do not use "universal" or multi-vehicle fluids, regardless of what the bottle claims. The friction modifiers and viscosity of WS fluid are precisely matched to the transmission's internal clutches and control solenoids. Using the wrong fluid can cause harsh shifting, shuddering, and eventual transmission failure. A drain and fill only replaces about a third of the fluid, so it's a simple, preventative service that keeps the fluid fresh.

Driveline Fluids (AWD Models)

Transfer Case & Front Differential

Specification: Toyota Genuine Differential Gear Oil LT 75W-85 GL-5 Capacity: 0.9 quarts

For All-Wheel Drive models, the transfer case (which also lubricates the front differential) requires a specific high-quality gear oil. This is not standard 75W-90. Toyota specifies a 75W-85 GL-5 fluid. Using the incorrect fluid can lead to increased noise and premature wear on the gear sets. Inspection is recommended every 30,000 miles, with replacement if the vehicle is used for towing or other severe duty applications.

Rear Differential

Specification: Toyota Genuine Differential Gear Oil LT 75W-85 GL-5 Capacity: 0.5 quarts

Similar to the transfer case, the rear differential on AWD models also uses the specific Toyota 75W-85 GL-5 gear oil. The capacity is very small, making it an easy and inexpensive service. Do not substitute with other gear oil weights unless it is an emergency, and have it replaced with the correct fluid as soon as possible.

Brake Fluid

Specification: DOT 3 or DOT 4

Your Highlander's brake system is filled with DOT 3 from the factory. However, DOT 4 fluid is an acceptable and often preferred replacement, as it has a higher boiling point, which provides an extra margin of safety against brake fade. The two are compatible and can be mixed. Never use DOT 5 fluid. DOT 5 is silicone-based and is not compatible with the seals and ABS system in your vehicle.

Brake fluid is hygroscopic, meaning it absorbs moisture from the air over time. This moisture lowers the boiling point and can cause internal corrosion. A full fluid flush is recommended every 3 years or 30,000 miles, regardless of mileage.

Power Steering Fluid

The 2019 Toyota Highlander is equipped with Electric Power Steering (EPS). This system uses an electric motor to provide steering assistance instead of a hydraulic pump. Therefore, it does not have any power steering fluid to check or change.

Windshield Washer Fluid

Specification: Any high-quality washer solvent Capacity: Approximately 4.8 quarts

Use a quality, brand-name windshield washer fluid. In winter months, use a fluid with a low freezing point to prevent damage to the reservoir, lines, and pump. Avoid using simple water, as it does not clean effectively and can grow bacteria in the reservoir.

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Adhering to these specifications is the best way to ensure your 2019 Highlander provides safe, reliable service for years to come. When in doubt, always refer to your owner's manual or consult a professional.

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