2020 Toyota Tundra Complete Fluid Specifications Guide

As an ASE-certified master technician, I cannot stress enough how critical correct fluid specifications are for the longevity of your truck. The 2020 Toyota Tundra, powered exclusively by the legendary 5.7L 3UR-FE V8 engine in the US market, is a million-mile capable machine—but only if you maintain it by the book. Using the wrong transmission fluid, mixing coolants, or ignoring differential service intervals can turn a bulletproof drivetrain into a costly headache.

Below is your complete, master-tech approved fluid specification sheet for the 2020 Toyota Tundra. Whether you are doing a weekend service in your driveway or buying fluids to bring to your mechanic, this guide contains every factory-spec fluid requirement.

Quick reference

Fluid	Type/Spec	Capacity
Engine Oil (5.7L V8)	SAE 0W-20 (ILSAC GF-5 or GF-6A, API SN/SP)	7.9 Quarts (with filter)
Engine Coolant	Toyota Super Long Life Coolant (SLLC) - Pink	13.7 Quarts
Transmission Fluid	Toyota Genuine ATF WS	12.3 Quarts (Total Dry Fill)
Transfer Case (4WD)	Toyota Genuine Transfer Gear Oil LF (SAE 75W)	1.2 Quarts
Front Differential (4WD)	Toyota Genuine Differential Gear Oil (SAE 75W-85 GL-5)	2.2 Quarts
Rear Differential	Toyota Genuine Differential Gear Oil (SAE 75W-85 GL-5)	3.6 to 4.2 Quarts*
Brake Fluid	FMVSS No. 116 DOT 3	System Dependent
Power Steering Fluid	ATF DEXRON II or III	System Dependent
Washer Fluid	Standard Automotive Washer Fluid	~3.0 Quarts

*Rear differential capacity varies slightly depending on axle configuration. Always fill to the bottom of the fill hole and verify in owner's manual / OEM service info.

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Engine Oil

The 5.7L 3UR-FE V8 in the 2020 Tundra requires SAE 0W-20 motor oil. You must ensure the oil meets API SN, API SP, or ILSAC GF-5/GF-6A standards. Toyota uses a cartridge-style oil filter, and a complete oil and filter change will require 7.9 quarts.

Tech Notes: Toyota recommends a 10,000-mile oil change interval under "normal" driving conditions. However, if you are towing, hauling heavy loads, idling extensively, or driving in dusty conditions (which classifies as "severe duty"), you should reduce that interval to 5,000 miles. Don't forget to replace the aluminum crush washer on the oil drain plug and the O-rings on the filter housing cap.

Engine Coolant

Toyota vehicles are highly specific about their cooling systems. The 2020 Tundra requires Toyota Super Long Life Coolant (SLLC), which is pre-mixed (50/50) and Pink in color.

Tech Notes: This is a Phosphated Hybrid Organic Acid Technology (P-HOAT) coolant. Never mix OAT with HOAT, and absolutely never use "universal" green coolant. Mixing coolants can cause the silicates or phosphates to drop out of suspension, gelling up in your heater core or radiator. Factory SLLC is rated for 100,000 miles or 10 years for the initial fill, and every 50,000 miles or 5 years thereafter.

Transmission Fluid

The Tundra’s 6-speed AB60E/AB60F automatic transmission requires Toyota Genuine ATF WS (World Standard). Do not let the "sealed for life" terminology fool you; there is no dipstick, but the fluid is absolutely serviceable and needs to be changed.

Tech Notes: Never use universal ATF. ATF WS has very specific friction modifiers tailored to the lock-up clutch in Toyota's torque converters. A simple drain and fill will yield about 3.2 quarts, while a full dry capacity is 12.3 quarts. If you tow frequently, I highly recommend a drain-and-fill every 60,000 miles. Checking the level requires jumping OBD2 pins to enter the "Transmission Fluid Temperature Check Mode" and opening the check valve at precisely 104°F - 113°F (40°C - 45°C).

Transfer Case (4WD Models)

Four-wheel drive Tundras utilize a transfer case that requires Toyota Genuine Transfer Gear Oil LF (SAE 75W).

Tech Notes: The 75W specification is quite thin, designed for maximum fuel economy and fast cold-weather engagement. While some aftermarket 75W-90 GL-5 fluids are technically compatible if you are in a pinch, sticking to the OEM 75W LF gear oil ensures smooth shifts between 2WD, 4HI, and 4LO without binding the actuators. Replace every 30,000 miles if you drive off-road or tow.

Front and Rear Differentials

Both the front and rear differentials call for SAE 75W-85 GL-5 gear oil. You can also safely use a high-quality SAE 75W-90 GL-5 if 75W-85 is unavailable in your area, as the difference in high-temperature viscosity is negligible for most climates.

Tech Notes: Tundras use an open rear differential governed by the ABS system (Auto-LSD), meaning no friction modifier or LSD additive is required for the 2020 model year. Always remove the fill plug before removing the drain plug—if you drain the fluid and find the fill plug is seized, you'll be stranded. Change differential fluids every 30,000 miles under severe duty or towing conditions.

Brake Fluid

Toyota specifies DOT 3 brake fluid for the 2020 Tundra.

Tech Notes: Brake fluid is hygroscopic, meaning it absorbs moisture from the atmosphere over time. This lowers the boiling point and can cause internal corrosion in your ABS pump and calipers. A complete brake fluid flush should be performed every 2 to 3 years or 30,000 miles. Never use DOT 5 (silicone-based) fluid, as it is incompatible with the Tundra’s ABS seals.

Power Steering Fluid

Unlike many modern trucks that have shifted to electronic power steering (EPS), the 2020 Tundra still retains a hydraulic power steering pump. The spec is ATF DEXRON II or III.

Tech Notes: Do not buy off-the-shelf "Power Steering Fluid." Standard clear power steering fluid lacks the proper friction modifiers and anti-wear additives for the Toyota steering rack and pump. Use an automatic transmission fluid (ATF) meeting the Dexron II/III spec (often red in color). Check the level on the reservoir dipstick when the fluid is warm.

Washer Fluid

Standard automotive washer fluid is required. The reservoir holds roughly a gallon (about 3.0 quarts). In regions that experience freezing temperatures, ensure you swap out summer bug-wash for a winter-blend fluid rated for -20°F or lower to prevent the reservoir and lines from cracking.

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Proper fluid maintenance is the cheapest insurance policy you can buy for your Tundra. By adhering to the factory specifications and severe-duty intervals, your UR-series V8 will provide decades of reliable service.

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