2025 Toyota Highlander Complete Fluid Specifications

As an ASE-certified master technician, I’ve serviced countless Toyota SUVs, and the Highlander remains one of the most reliable vehicles on the road. However, keeping it that way requires strict adherence to Toyota's factory fluid specifications. The 2025 Toyota Highlander is available with two distinct powertrains: a 2.4-liter turbocharged 4-cylinder engine and a 2.5-liter 4-cylinder hybrid system. Because these drivetrains operate very differently, their fluid requirements and capacities vary significantly.

Below is your complete, professional-grade fluid specification guide for the 2025 Toyota Highlander.

Quick reference

Fluid	Type/Spec	Capacity
Engine Oil (2.4L Turbo Gas)	0W-20, API SP / ILSAC GF-6A	5.6 qts (with filter)
Engine Oil (2.5L Hybrid)	0W-16, API SP / ILSAC GF-6B	4.8 qts (with filter)
Engine Coolant	Toyota Super Long Life Coolant (Pink), OAT	8.7 qts (Gas) / 7.3 qts (Hybrid Engine) + 2.1 qts (Inverter)
Transmission Fluid (8-Spd Auto)	Toyota Genuine ATF WS (JWS 3324)	7.7 qts (Dry fill) / ~3.0 qts (Drain & Fill)
Transmission Fluid (Hybrid eCVT)	Toyota Genuine ATF WS (JWS 3324)	4.0 qts (Dry fill)
Transfer Case (AWD Gas)	Toyota Genuine Transfer Gear Oil LF 75W or 75W-85 GL-5	0.45 - 0.5 qts
Rear Differential (AWD Gas)	Toyota Genuine Differential Gear Oil LT 75W-85 GL-5	0.5 - 0.7 qts (Verify in owner's manual)
Rear Motor/Diff (Hybrid AWD-i)	Toyota Genuine ATF WS	1.4 qts
Brake Fluid	FMVSS No. 116 DOT 3 or DOT 4	As needed (Fill to MAX line)
Power Steering Fluid	N/A (Electric Power Steering)	N/A
Washer Fluid	Standard Automotive Washer Fluid	~4.5 qts
DEF (Diesel Exhaust Fluid)	N/A (Gas/Hybrid only)	N/A

Note: Capacities are approximate and serve as a baseline. Always fill to the proper level indicated on the dipstick or fill plug and verify in your owner's manual or OEM service info, as capacities can vary slightly based on specific trim and towing packages.

Engine Oil

The 2025 Highlander's engine oil requirements depend entirely on the powertrain.

• 2.4L Turbocharged Gas Engine: Requires SAE 0W-20 engine oil that meets API SP / ILSAC GF-6A standards. The turbocharger creates immense heat, making the API SP rating critical to prevent Low-Speed Pre-Ignition (LSPI) and timing chain wear.
• 2.5L Hybrid Engine: Requires the ultra-low viscosity SAE 0W-16 engine oil meeting API SP / ILSAC GF-6B standards. This thinner oil maximizes fuel efficiency during the hybrid system's frequent start/stop cycles.

Intervals & Pitfalls: Toyota recommends a 10,000-mile or 12-month oil change interval under normal driving conditions. However, for severe conditions (frequent short trips, towing, heavy stop-and-go traffic), I strongly advise changing it every 5,000 miles or 6 months. Never substitute 0W-16 with older, thicker oils like 5W-30 in the hybrid, as it can cause variable valve timing (VVT-i) actuation issues and reduce fuel economy.

Engine Coolant

Toyota uses its proprietary Toyota Super Long Life Coolant (SLLC), which is pre-mixed 50/50 with deionized water. It is distinctive for its Pink color. This is an Organic Acid Technology (OAT) coolant containing no silicates, amines, nitrites, or borates.

Intervals & Pitfalls: The factory fill is rated for 100,000 miles or 10 years. Subsequent replacements should be done every 50,000 miles or 5 years. Never mix OAT (Pink) with older HOAT (Red) or universal green coolants. Mixing coolant types can cause the additives to precipitate, turning the coolant into a gel that will clog the heater core and radiator, leading to catastrophic engine or hybrid inverter overheating. Note that hybrid models have two separate cooling loops (engine and inverter); both take the same Pink SLLC fluid, but they must be bled independently.

Transmission Fluid

Whether you have the 8-speed automatic (Direct Shift-8AT) in the gas model or the eCVT in the hybrid, Toyota specifies Toyota Genuine ATF WS (World Standard), corresponding to the JWS 3324 specification.

Intervals & Pitfalls: Toyota lists this as a "lifetime" fluid under normal driving conditions, but as a master technician, I can tell you that no fluid defies the laws of physics. If you tow, drive in mountains, or carry heavy loads, you should perform a drain-and-fill every 60,000 miles. Never use universal ATF. ATF WS has very specific friction modifiers designed for Toyota's clutch packs and hybrid stators; using a universal fluid can result in harsh shifting, torque converter shudder, or internal damage.

Transfer Case and Differential Fluid

For All-Wheel Drive (AWD) models, maintaining the gear oil is critical for drivetrain longevity.

• Gas AWD Models: The transfer case and rear differential require Toyota Genuine Transfer/Differential Gear Oil LF 75W or a high-quality 75W-85 GL-5 gear oil. If your Highlander is equipped with Dynamic Torque Vectoring AWD (TV-AWD), correct fluid spec is paramount to keep the clutch packs operating smoothly.
• Hybrid AWD-i Models: The hybrid does not have a traditional transfer case or driveshaft. Instead, it uses an independent electric motor on the rear axle (Q-TEq). The rear motor/differential unit does not use heavy gear oil; it uses Toyota Genuine ATF WS (approx. 1.4 quarts).

Intervals & Pitfalls: Inspect every 15,000 miles. Replace every 30,000 to 60,000 miles depending on usage (towing requires the shorter interval). Putting 75W-90 gear oil into a Hybrid rear electric motor will destroy it—always remember that the hybrid rear diff takes ATF WS!

Brake Fluid

The 2025 Highlander braking system is designed for DOT 3 or DOT 4 brake fluid.

Intervals & Pitfalls: Brake fluid is hygroscopic, meaning it absorbs moisture from the atmosphere over time. This moisture lowers the boiling point of the fluid and rusts the internal components of the ABS actuator. Flush and replace the brake fluid every 3 years or 30,000 miles. Ensure the cap is tightly sealed after checking, and never use DOT 5 (silicone-based) fluid, as it is strictly incompatible with ABS systems.

Power Steering, Washer Fluid, and DEF

• Power Steering: The 2025 Highlander uses Electronic Power Steering (EPS). There is no power steering pump, hoses, or fluid to check or replace.
• Washer Fluid: Use any standard automotive washer fluid. In climates that experience freezing temperatures, ensure you swap to a winter-grade fluid (rated to -20°F or lower) to prevent the fluid reservoir and pump from freezing and cracking.
• Diesel Exhaust Fluid (DEF): The Highlander is only available in gasoline and gasoline-hybrid configurations in the North American market. No DEF is required.

Proper fluid maintenance is the lifeblood of your Toyota Highlander. Taking the time to verify specifications and use OEM-grade fluids will keep it running smoothly for hundreds of thousands of miles.

Find a trusted shop on Repairius.