2018 Toyota RAV4 Fluid Type Specifications

As an ASE-certified master technician, I've compiled this comprehensive fluid specification guide for your 2018 Toyota RAV4. Using the correct fluids is paramount for the longevity, performance, and reliability of your vehicle. Always refer to your owner's manual or an OEM service information system for the most up-to-date and specific information for your exact trim and engine.

Quick reference

Fluid	Type/Spec	Capacity
Engine Oil	SAE 0W-20, API SN/SP or ILSAC GF-5/GF-6	4.6 quarts (4.4 liters) with filter
Engine Coolant	Toyota Super Long Life Coolant (SLLC) Pink, OAT	7.3 - 7.9 quarts (6.9 - 7.5 liters) (estimate)
Transmission Fluid	Toyota WS (World Standard)	Consult owner's manual / OEM service info
Transfer Case (AWD)	SAE 75W-85 GL-5	~0.5 quarts (0.47 liters)
Rear Differential	SAE 75W-85 GL-5	~0.5 quarts (0.47 liters)
Brake Fluid	DOT 3	Consult owner's manual / OEM service info
Power Steering Fluid	Electric Power Steering (No Fluid)	N/A
Washer Fluid	Toyota Genuine Washer Fluid or equivalent	Consult owner's manual / OEM service info

Engine Oil

Your 2018 Toyota RAV4 (excluding Hybrid models, which also use 0W-20) requires SAE 0W-20 engine oil. It is crucial to use oil that meets API SN/SP or ILSAC GF-5/GF-6 specifications. These specifications indicate that the oil has been tested and meets the performance standards required by Toyota for optimal engine protection, fuel efficiency, and emissions control. Using an oil with a different viscosity or lower specification can lead to increased engine wear, reduced fuel economy, and potential engine damage.

Capacity: Approximately 4.6 quarts (4.4 liters) with a filter change. Always double-check with the dipstick after filling and running the engine briefly.

Intervals: Toyota generally recommends oil changes every 10,000 miles or 12 months under normal driving conditions when using synthetic oil. However, for severe driving conditions (such as frequent short trips, towing, extensive idling, or dusty environments), this interval should be shortened, typically to 5,000 miles or 6 months. Always consult your owner's manual for the specific maintenance schedule for your vehicle.

Engine Coolant

The 2018 Toyota RAV4 uses Toyota Super Long Life Coolant (SLLC), which is typically pink in color. This is an Original Equipment Manufacturer (OEM) Specific Organic Acid Technology (OAT) coolant, pre-mixed to a 50/50 ratio with deionized water. It is designed for extended service intervals and provides excellent corrosion protection for all engine cooling system components. It is essential not to mix this coolant with other types, such as traditional green (inorganic acid technology - IAT) or other colors of HOAT (Hybrid Organic Acid Technology) coolants, as this can lead to chemical incompatibilities, gelling, reduced corrosion protection, and potential damage to the cooling system.

Capacity: The cooling system capacity is approximately 7.3 - 7.9 quarts (6.9 - 7.5 liters). This can vary slightly based on engine and trim. A drain and fill will typically replace a good portion, but not all, of the system fluid. For a complete flush, specialized equipment is often required.

Intervals: Toyota SLLC has a very long service life, often recommended for replacement at 100,000 miles or 10 years for the first change, and then every 50,000 miles or 5 years thereafter. Always refer to your maintenance schedule.

Transmission Fluid

Your 2018 Toyota RAV4 (with automatic transmission) uses Toyota WS (World Standard) automatic transmission fluid. This is a highly specific, low-viscosity synthetic fluid engineered exclusively for Toyota and Lexus transmissions. Using any other type of automatic transmission fluid, including "universal" ATFs, can lead to premature wear, harsh shifting, and potential transmission failure. The transmission of the 2018 RAV4 is a sealed unit, and many Toyota dealerships recommend "lifetime" fluid, meaning it does not require regular changes unless a repair is performed or severe driving conditions are encountered. However, experienced technicians often recommend a drain and fill (not a flush) every 60,000 to 100,000 miles for optimal longevity, especially for vehicles driven in hot climates or under heavy load.

Capacity: Consult your owner's manual or an OEM service information system for exact capacities, as it varies significantly between a simple drain and fill and an overhaul.

Intervals: Toyota generally states the fluid is "lifetime." However, for optimal longevity, consider a drain and fill every 60,000-100,000 miles, especially if you experience heavy use.

Transfer Case (All-Wheel Drive models only)

For 2018 Toyota RAV4 models equipped with All-Wheel Drive (AWD), the transfer case requires SAE 75W-85 GL-5 gear oil. This specific viscosity and GL-5 rating are critical for ensuring proper lubrication and protection of the gears under varying load conditions. Using an incorrect weight or specification can lead to increased wear, noise, and potential failure of the transfer case.

Capacity: Approximately 0.5 quarts (0.47 liters). Always fill to the bottom of the fill plug hole.

Intervals: Typically, the transfer case fluid should be inspected every 30,000 miles and replaced every 60,000 miles, or more frequently under severe driving conditions.

Rear Differential (All-Wheel Drive models only)

Similar to the transfer case, AWD 2018 Toyota RAV4 models require SAE 75W-85 GL-5 gear oil for the rear differential. The GL-5 rating indicates its ability to handle extreme pressure conditions. While some differential fluids require an LSD (Limited Slip Differential) additive, the 2018 RAV4 typically does not have a mechanical limited-slip differential in the rear, so no additional friction modifier is generally needed.

Capacity: Approximately 0.5 quarts (0.47 liters). Fill to the bottom of the fill plug hole.

Intervals: Similar to the transfer case, inspect every 30,000 miles and replace every 60,000 miles, or more frequently under severe driving conditions.

Brake Fluid

Your 2018 Toyota RAV4 uses DOT 3 brake fluid. This is a glycol-ether based fluid designed to meet specific boiling points and viscosity requirements. It is hydroscopic, meaning it absorbs moisture over time, which lowers its boiling point and can lead to corrosion in the brake system. It is critical to use only DOT 3 and never mix it with DOT 4, DOT 5.1, or especially DOT 5 (silicone-based) fluids, as chemical incompatibilities can cause damage to seals and lead to brake failure.

Capacity: Consult your owner's manual or OEM service information. The capacity depends on the entire brake system including calipers, lines, and master cylinder.

Intervals: Toyota typically recommends inspecting brake fluid at every service and replacing it every 30,000 miles or every 2-3 years, regardless of mileage, due to its moisture-absorbing properties. A fluid flush is highly recommended to remove contaminated fluid from the entire system.

Power Steering Fluid

The 2018 Toyota RAV4 is equipped with an Electric Power Steering (EPS) system. This means there is no traditional hydraulic power steering pump or fluid reservoir. The assist is provided by an electric motor, eliminating the need for power steering fluid altogether.

Washer Fluid

For your 2018 Toyota RAV4, use Toyota Genuine Washer Fluid or any commercially available automotive washer fluid. It is important to use a fluid specifically designed for automotive use and to ensure it has adequate freeze protection for your climate. Avoid using plain water, especially in cold weather, as it can freeze and damage the washer system components.

Capacity: Consult your owner's manual. The reservoir typically holds a few liters.

Intervals: Refill as needed. Always top off before winter to ensure appropriate freeze protection.

Diesel Exhaust Fluid (DEF)

The 2018 Toyota RAV4 is a gasoline-powered vehicle and does not use Diesel Exhaust Fluid (DEF). DEF is only used in diesel engines with Selective Catalytic Reduction (SCR) systems to reduce nitrogen oxide emissions.

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