2020 Nissan Frontier: All Fluid Specifications & Capacities

As a workhorse pickup, the 2020 Nissan Frontier is built to last. But longevity doesn't happen by accident—it requires consistent maintenance with the correct fluids and lubricants. Using the wrong type of oil, coolant, or transmission fluid can lead to accelerated wear, poor performance, and even catastrophic failure of expensive components.

This guide provides a comprehensive list of all factory-specified fluids for the 2020 Nissan Frontier. Stick to these OEM recommendations to keep your truck running like new for years to come.

Quick Reference: 2020 Frontier Fluid Specs

Fluid	Type/Spec	Capacity
Engine Oil	SAE 5W-30 API SN	5.4 qt (5.1 L)
Engine Coolant	Nissan Long Life Blue Coolant (P/N 999MP-L25500P)	~10.0 qt (9.5 L)
Automatic Transmission	Nissan MATIC S ATF	~11.0 qt (10.4 L)
Transfer Case (4WD)	Nissan MATIC D ATF	2.1 qt (2.0 L)
Front Differential (4WD)	API GL-5 SAE 80W-90 Gear Oil	1.7 pt (0.8 L)
Rear Differential	API GL-5 SAE 75W-90 Synthetic Gear Oil	3.4 pt (1.6 L)
Brake Fluid	DOT 3	As needed
Power Steering Fluid	Nissan PSF or Dexron VI ATF	As needed
Windshield Washer	All-Season Washer Fluid	~2.6 qt (2.5 L)

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Engine Oil

The heart of the Frontier is its robust 3.8L V6 engine (VQ38DD), introduced for the 2020 model year. This modern direct-injection engine requires a high-quality lubricant to protect its intricate components.

• Specification: SAE 5W-30 meeting API Service SN standards.
• Capacity: 5.4 quarts (5.1 liters) with filter change.

Notes: Always use an oil that displays the API "Donut" certification mark to ensure it meets the minimum performance standards. While conventional 5W-30 is acceptable, a full synthetic oil will offer superior protection against heat, oxidation, and sludge formation, especially for trucks that see heavy use, towing, or frequent short trips. Nissan's genuine oil (P/N 999MP-5W30NP) is a reliable choice. Change the oil and filter every 5,000 miles or 6 months, or as indicated by your truck's oil life monitoring system.

Engine Coolant

The cooling system is critical for managing engine temperatures, from freezing winter mornings to hot summer days under load. Using the correct coolant is non-negotiable.

• Specification: Genuine Nissan Long Life Antifreeze/Coolant (Blue), Part Number 999MP-L25500P.
• Capacity: Approximately 10.0 quarts (9.5 liters) for a full system drain and fill.

Notes: The 2020 Frontier uses a specific Phosphated Organic Acid Technology (P-OAT) coolant. Do not mix this with other coolant types or colors. Never use "universal" or generic green coolants, as their different chemical composition (silicates, borates) can react with the Nissan coolant, leading to gelling, corrosion, and blockages in the radiator and heater core. When topping off, use only the pre-mixed 50/50 Nissan blue coolant or a compatible P-OAT aftermarket equivalent. A complete drain and fill is recommended every 60,000 to 75,000 miles.

Automatic Transmission Fluid

The 9-speed automatic transmission in the 2020 Frontier is a sophisticated unit that demands a very specific fluid for proper clutch engagement and lubrication.

• Specification: Genuine Nissan MATIC S ATF.
• Capacity: Approximately 11 quarts for a full system, but capacity for a drain-and-fill is closer to 4-5 quarts.

Notes: This is one of the most critical fluids to get right. There are no universal equivalents for Nissan MATIC S. Using any other fluid, such as Dexron, Mercon, or generic multi-vehicle ATF, can and will cause severe shifting problems, torque converter shudder, and eventual transmission failure. When servicing the transmission, it is best to perform a simple drain-and-fill rather than a high-pressure "flush," which can sometimes dislodge debris and cause issues. Check your owner's manual for the service interval, which is typically between 30,000 and 60,000 miles.

Transfer Case Fluid (4WD Models)

For 4x4 models, the transfer case directs power to the front and rear axles. It requires its own lubricant.

• Specification: Genuine Nissan MATIC D ATF.
• Capacity: 2.1 quarts (2.0 liters).

Notes: Interestingly, the transfer case does not use the same fluid as the main transmission. It specifies the older MATIC D formulation. While it may seem counterintuitive to use an automatic transmission fluid in a gear case, this is the correct OEM specification. Do not substitute gear oil.

Differential Fluid

Your Frontier has two differentials (on 4WD models, one on 2WD) that require heavy-duty gear oil.

• Front Differential (4WD): SAE 80W-90 API GL-5 Gear Oil.

• Capacity: 1.7 pints (0.8 liters).

• Rear Differential: SAE 75W-90 Synthetic API GL-5 Gear Oil.

• Capacity: 3.4 pints (1.6 liters).

Notes: The rear differential specifically calls for a synthetic lubricant, which provides better thermal stability under heavy loads. If your Frontier is equipped with an electronic locking rear differential, no special friction modifier additive is required. Always use a high-quality gear oil meeting the API GL-5 standard to protect against extreme pressure and wear. These fluids should be inspected every 15,000-20,000 miles and changed if they appear dark, milky (water contamination), or gritty.

Brake & Power Steering Fluid

• Brake Fluid: DOT 3. A DOT 4 fluid can be used as an upgrade for higher boiling points, but never use DOT 5 (silicone-based).
• Power Steering Fluid: Genuine Nissan PSF or an equivalent Dexron VI (DEXRON 6) ATF.

Notes: Brake fluid is hygroscopic, meaning it absorbs moisture from the air over time. This moisture lowers the boiling point and can corrode internal brake components. It should be replaced every 2-3 years, regardless of mileage. For power steering, using the specified Nissan fluid or a licensed Dexron VI ATF is essential for the health of the pump and steering rack.

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Using the correct, manufacturer-specified fluids is the single most important thing an owner can do to ensure their 2020 Frontier provides many years of reliable service. When in doubt, always refer to your owner's manual or consult a professional.

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