2025 Toyota Tundra — Complete Fluid Type Specifications

Quick reference

Fluid	Type/Spec	Capacity
Engine oil	Full-synthetic 0W-20 or 0W-30 meeting API SP, ILSAC GF-6A (Toyota Genuine Motor Oil)	Approx. 6.7–7.8 qt (6.3–7.4 L) w/filter depending on engine; verify in owner’s manual/OEM service info
Engine coolant	Toyota Super Long Life Coolant (SLLC), pink, phosphate OAT (P-OAT), premixed 50/50	Engine loop approx. 11–15 qt (10–14 L) depending on model; i-FORCE MAX adds separate inverter loop ~2–3 qt (2–3 L); verify
Automatic transmission	Toyota ATF WS (World Standard), JWS 3324	Service fill ~3–5 qt (2.8–4.7 L); dry capacity ~10–13 qt (9.5–12.3 L); verify by VIN
Transfer case (4WD)	Toyota Genuine Transfer Gear Oil LF 75W (API GL-4) — verify; some earlier Toyota trucks used ATF WS	Approx. 1.5–2.0 qt (1.4–1.9 L); verify in owner’s manual/OEM service info
Front differential (4x4)	API GL-5 gear oil, SAE 75W-85 (Toyota Hypoid Gear Oil LT 75W-85) or 75W-90 where permitted	Approx. 1.5–2.1 qt (1.4–2.0 L); verify
Rear differential	API GL-5 gear oil, SAE 75W-85 (Toyota Hypoid Gear Oil LT 75W-85) or 75W-90 where permitted	Approx. 2.9–3.9 qt (2.7–3.7 L) depending on axle; verify
Brake fluid	DOT 3, FMVSS No. 116 compliant (DOT 4 acceptable but not required)	Fill to MAX line; ~1 qt (0.95 L) typically needed for full flush
Power steering	Electric Power Steering (EPS) — no serviceable fluid	N/A
Windshield washer	Any reputable premixed washer fluid appropriate to climate	~1–2 gal (3.8–7.6 L), varies by equipment
Diesel Exhaust Fluid (DEF)	Not applicable — 2025 Tundra (U.S./Canada) is gasoline only	N/A

Engine oil

Toyota’s twin‑turbo V6 (i‑FORCE 3.4L, marketed as 3.5L; V35A‑FTS) and the i‑FORCE MAX hybrid use full‑synthetic oil meeting API SP and ILSAC GF‑6A. Viscosity: 0W‑20 is widely specified; 0W‑30 may be allowed/recommended for sustained towing, high‑load, or high‑temperature service in some calibrations. Do not use oils that lack the API “SP” starburst.

• Capacity: approximately 6.7–7.8 quarts with filter depending on engine variant and configuration. Verify in the owner’s manual or OEM service information for your exact VIN.
• Interval: Toyota commonly specifies up to 10,000 miles/12 months with 0W‑20 synthetic under normal conditions; reduce to 5,000 miles/6 months for severe service (frequent towing, short trips, dusty environments, or heavy idling). Always follow the maintenance minder.
• Tips/pitfalls: Use a quality filter meeting Toyota requirements. Do not mix viscosities indiscriminately. If switching between 0W‑20 and 0W‑30 for severe use, keep intervals conservative and monitor consumption.

Engine coolant

Use Toyota Super Long Life Coolant (SLLC) — pink, premixed 50/50, phosphate organic acid technology (P‑OAT). Do not substitute “universal” green or silicated coolants.

• Spec/type: Toyota SLLC (pink), P‑OAT.
• Capacity: engine loop typically 11–15 quarts depending on model/year; the i‑FORCE MAX hybrid has an additional inverter/e‑motor coolant loop that also uses Toyota SLLC, about 2–3 quarts. Always verify exact capacities in OEM info.
• Interval: first replacement commonly at 10 years/100,000 miles, then every 5 years/50,000 miles thereafter.
• Tips/pitfalls: Never mix Toyota pink SLLC with older red Toyota LLC or other HOAT/OAT coolants. Air bleeding is critical; use the proper procedure and spill‑free funnel. Hybrid models have separate reservoirs for engine and inverter circuits—service each separately.

Automatic transmission fluid (ATF)

The 10‑speed automatic in the 2025 Tundra uses Toyota ATF WS (World Standard), which aligns with JWS 3324.

• Spec: Toyota ATF WS (JWS 3324). Do not use “universal” ATF or Dexron/Mercon substitutes.
• Capacity: drain/fill service is typically 3–5 quarts; dry capacity about 10–13 quarts depending on variant. Verify by VIN.
• Interval: Toyota labels WS as “lifetime” under normal conditions; for towing, off‑road, hot/cold extremes, or heavy use, many technicians recommend inspection by 60,000 miles and a measured drain‑and‑fill every 60,000–90,000 miles.
• Tips/pitfalls: Fluid level setting on WS units is temperature‑dependent and requires scan‑tool monitoring of ATF temp and the overflow plug procedure. Overfilling or underfilling can cause shift issues.

Transfer case (4WD)

Most 2022–2025 Tundra 4WD models specify Toyota Genuine Transfer Gear Oil LF 75W (API GL‑4). Some previous Toyota trucks used ATF WS in the transfer case, so confirm for your VIN.

• Spec: Toyota Transfer Gear Oil LF 75W, API GL‑4 — verify in the owner’s manual/OEM service info for your exact truck.
• Capacity: approximately 1.5–2.0 quarts.
• Interval: inspect at 30,000 miles for severe service; change around 60,000–90,000 miles depending on use.
• Tips/pitfalls: Do not substitute GL‑5 gear oil where GL‑4 is specified for the transfer case. Always remove the fill plug before the drain plug.

Front and rear differentials

Use API GL‑5 hypoid gear oil. Toyota typically fills with SAE 75W‑85 (Toyota Hypoid Gear Oil LT 75W‑85). Some owner’s manuals allow SAE 75W‑90 for broader availability or high‑load use.

• Spec: API GL‑5, SAE 75W‑85 (or 75W‑90 where permitted by Toyota).
• Capacities: front diff ~1.5–2.1 quarts; rear diff ~2.9–3.9 quarts depending on axle. Verify exact axle code and capacity.
• Interval: 30,000–60,000 miles for towing/off‑road/heavy use; otherwise up to 100,000 miles. Replace sooner if water intrusion is suspected.
• LSD/additives: The 2025 Tundra uses open or electronically controlled locking/e‑LSD systems that do not require friction modifier. Do not add limited‑slip additives unless you have an aftermarket clutch‑type LSD that specifically calls for it.

Brake fluid

Use DOT 3 brake fluid meeting FMVSS No. 116. DOT 4 is compatible but not required unless specified.

• Capacity: fill to MAX; about 1 quart is typically sufficient for a complete flush/bleed.
• Interval: replace every 2–3 years regardless of mileage, or when moisture content/boiling point tests indicate.
• Tips/pitfalls: Keep the reservoir clean. Avoid spilling on painted surfaces. For trucks with advanced driver assistance systems, follow proper bleed procedures to protect the ABS/ESC modules.

Power steering

The 2025 Tundra uses Electric Power Steering (EPS). There is no hydraulic power steering fluid to service.

Windshield washer fluid

Use any reputable premixed washer fluid appropriate for your climate (bug remover in summer, de‑icer in winter). Capacity typically ranges from about 1 to 2 gallons depending on equipment.

Diesel Exhaust Fluid (DEF)

Not applicable in North American 2025 Tundra models, which are gasoline only. If operating a diesel vehicle in other markets, DEF must meet ISO 22241 — but the U.S./Canada Tundra does not require DEF.

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