2021 Jeep Wrangler Fluid Type Specs

As an ASE-certified master technician, I've compiled this comprehensive fluid specification guide for your 2021 Jeep Wrangler. Adhering to these factory-recommended fluids and service intervals is crucial for maintaining your vehicle's performance, longevity, and warranty.

Quick reference

Fluid	Type/Spec	Capacity
Engine Oil (2.0L I4)	SAE 5W-30, API SP / SN Plus, Mopar MS-13340	5.0 quarts (4.7 liters)
Engine Oil (3.6L V6)	SAE 5W-20, API SP / SN Plus, Mopar MS-6395	6.0 quarts (5.7 liters)
Engine Oil (3.0L EcoDiesel)	SAE 5W-40, ACEA C3, Mopar MS-11106	9.5 quarts (9.0 liters)
Engine Coolant	OAT (Organic Additive Technology), Mopar MS-90032 (Purple)	10.0-14.0 quarts (9.5-13.2 liters) - verify in owner's manual
Automatic Transmission (850RE - 2.0L I4, 3.6L V6)	ZF 8&9 Speed ATF, Mopar ZF 8HP Automatic Transmission Fluid (Mopar 68157995AB)	5.5 quarts (5.2 liters) for drain and fill; ~9-10 quarts total capacity
Automatic Transmission (8HP75 - 3.0L EcoDiesel)	ZF 8&9 Speed ATF, Mopar ZF 8HP Automatic Transmission Fluid (Mopar 68218925AB)	5.5 quarts (5.2 liters) for drain and fill; ~9-10 quarts total capacity
Manual Transmission (NSG370 - 3.6L V6)	SAE 75W-85 GL-3/GL-4, Mopar Manual Transmission Lubricant (68001614AB)	1.6 quarts (1.5 liters)
Transfer Case (MP1008/MP1007 Command-Trac NV241)	Mopar NV241/NV242/NV244 Transfer Case Fluid (Mopar 68089190AB)	1.5 quarts (1.4 liters)
Transfer Case (MP3022 Selec-Trac & MP3023 Rock-Trac NV241OR)	Mopar MP3022/MP3023 Transfer Case Fluid (Mopar 68087362AA)	1.8-2.0 quarts (1.7-1.9 liters) - verify in owner's manual
Front Differential (Dana 30/M186, M210 AdvanTEK)	SAE 75W-90 API GL-5, Mopar Gear & Axle Lubricant (68210057AB)	1.3-1.4 quarts (1.2-1.3 liters) - verify in owner's manual
Rear Differential (Dana 35/M200, M220 AdvanTEK)	SAE 75W-90 API GL-5, Mopar Gear & Axle Lubricant (68210057AB) (with Mopar limited slip additive for Trac-Lok)	1.2-1.3 quarts (1.1-1.2 liters) - verify in owner's manual
Brake Fluid	DOT 4, Mopar Brake Fluid (Mopar 68048600AC)	As required
Power Steering Fluid	Not applicable (Electric Power Steering)	N/A
Washer Fluid	Mopar Windshield Washer Fluid	As required
Diesel Exhaust Fluid (DEF)	ISO 22241 (AdBlue equivalent)	5.2 gallons (19.7 liters)

Engine Oil

The 2021 Jeep Wrangler offers a range of engine options, each with specific oil requirements:

• 2.0L Turbo I4 Engine: Uses SAE 5W-30 engine oil meeting API SP or SN Plus standards and Mopar Material Standard MS-13340. The capacity is approximately 5.0 quarts (4.7 liters).
• 3.6L Pentastar V6 Engine: Requires SAE 5W-20 engine oil also meeting API SP or SN Plus standards and Mopar Material Standard MS-6395. The capacity is approximately 6.0 quarts (5.7 liters).
• 3.0L EcoDiesel V6 Engine: This engine is much more particular, requiring SAE 5W-40 engine oil that meets ACEA C3 specifications and Mopar Material Standard MS-11106. The capacity is approximately 9.5 quarts (9.0 liters).

Interval: Generally, engine oil and filter should be changed every 10,000 miles (16,000 km) or 12 months, whichever comes first, under normal driving conditions. However, for severe duty (e.g., frequent short trips, extreme temperatures, towing, off-road use), this interval should be shortened. Always consult your owner's manual for the most accurate and up-to-date information based on your vehicle's specific usage.

Common Pitfalls: Using an incorrect oil viscosity or specification can lead to increased engine wear, reduced fuel economy, and potential internal damage. Never use conventional oil if synthetic is specified. For the EcoDiesel, using oil that doesn't meet the ACEA C3 and MS-11106 specs can damage the diesel particulate filter (DPF).

Engine Coolant

Your 2021 Jeep Wrangler uses Organic Additive Technology (OAT) coolant, specifically Mopar Antifreeze/Coolant 10 Year/150,000 Mile Formula, which is purple in color and meets Mopar Material Standard MS-90032. This coolant is designed for extended life and provides excellent corrosion protection.

Capacity: The coolant capacity can vary slightly depending on the engine and specific cooling system configuration, ranging from approximately 10.0 to 14.0 quarts (9.5 to 13.2 liters). Always verify the exact capacity in your owner's manual or OEM service information.

Interval: The manufacturer recommends replacing the coolant every 10 years or 150,000 miles, whichever comes first.

Common Pitfalls: NEVER mix OAT coolant with other types of coolants, such as HOAT (Hybrid Organic Additive Technology) or traditional IAT (Inorganic Acid Technology) coolants. Mixing can lead to chemical incompatibilities, gelling, corrosion, and severe damage to the cooling system and engine components. Always use distilled water if you need to dilute concentrated coolant.

Transmission Fluid

Automatic Transmission

The 2021 Jeep Wrangler with automatic transmission typically uses the ZF 8-speed automatic. The fluid requirements depend on the specific ZF variant:

• 850RE (2.0L I4, 3.6L V6): Requires ZF 8&9 Speed ATF or equivalent, specifically Mopar ZF 8HP Automatic Transmission Fluid (P/N 68157995AB).
• 8HP75 (3.0L EcoDiesel): Requires ZF 8&9 Speed ATF or equivalent, specifically Mopar ZF 8HP Automatic Transmission Fluid (P/N 68218925AB).

Capacity: A typical drain and fill will consume about 5.5 quarts (5.2 liters). The total system capacity is generally higher, around 9-10 quarts, requiring specialized equipment for a complete fluid exchange.

Interval: The manufacturer often states these transmissions are "filled for life" under normal operating conditions. However, for vehicles that tow, off-road frequently, or experience severe duty, more frequent servicing (e.g., every 60,000 to 80,000 miles) is highly recommended. Consult your owner's manual for severe duty schedules.

Common Pitfalls: Using "universal" or incorrect automatic transmission fluid can cause severe and irreversible damage to the transmission, leading to costly repairs. Transmission fluid is highly specific to the transmission's design and materials.

Manual Transmission

If your 2021 Jeep Wrangler has the NSG370 6-speed manual transmission (typically with the 3.6L V6 engine), it requires SAE 75W-85 GL-3/GL-4 manual transmission lubricant. The factory fill is Mopar Manual Transmission Lubricant (P/N 68001614AB).

Capacity: Approximately 1.6 quarts (1.5 liters).

Interval: Typically recommended for inspection every 20,000 miles and replacement every 100,000 miles, or more frequently under severe conditions.

Common Pitfalls: Do not use automatic transmission fluid or heavy gear oil (GL-5) in this manual transmission, as it can lead to shifting issues and damage synchronizers.

Transfer Case Fluid

The 2021 Jeep Wrangler can come with different transfer cases, and each requires a specific Mopar fluid:

• Command-Trac (NV241 - MP1008/MP1007): Uses Mopar NV241/NV242/NV244 Transfer Case Fluid (P/N 68089190AB). Capacity is approximately 1.5 quarts (1.4 liters).
• Selec-Trac & Rock-Trac (NV241OR - MP3022/MP3023): Uses Mopar MP3022/MP3023 Transfer Case Fluid (P/N 68087362AA). Capacity varies slightly, typically 1.8-2.0 quarts (1.7-1.9 liters). Verify in your owner's manual.

Interval: Generally recommended for inspection every 20,000 miles and replacement every 40,000 miles or sooner if significant off-road use occurs.

Common Pitfalls: Using incorrect fluid can lead to premature wear or failure of the transfer case components, especially clutch packs in part-time systems.

Differential Fluid (Front & Rear)

The Jeep Wrangler utilizes different axle models, but general fluid specifications are similar:

• Front Differential (Dana 30/M186, M210 AdvanTEK): Requires SAE 75W-90 API GL-5 gear oil. The factory fill is Mopar Gear & Axle Lubricant (P/N 68210057AB). Capacity is roughly 1.3-1.4 quarts (1.2-1.3 liters). Verify in your owner's manual.
• Rear Differential (Dana 35/M200, M220 AdvanTEK): Requires SAE 75W-90 API GL-5 gear oil. The factory fill is Mopar Gear & Axle Lubricant (P/N 68210057AB). If your Wrangler is equipped with a Trac-Lok (limited-slip differential), you MUST add a Mopar Limited Slip Additive (Friction Modifier P/N 04318060AB or equivalent) to prevent chatter and ensure proper operation. Capacity is roughly 1.2-1.3 quarts (1.1-1.2 liters). Verify in your owner's manual.

Interval: Differential fluid should typically be inspected every 20,000 miles and replaced every 40,000 miles, or more frequently with heavy towing, frequent off-road use, or water crossings.

Common Pitfalls: Neglecting to add limited-slip additive to a Trac-Lok differential will result in chattering and improper operation. Ensure the correct GL-5 rating is used, as GL-4 may not provide sufficient protection for hypoid gears.

Brake Fluid

Your 2021 Jeep Wrangler requires DOT 4 brake fluid. Mopar recommends Mopar Brake Fluid (P/N 68048600AC).

Interval: Brake fluid is hygroscopic, meaning it absorbs moisture over time, which lowers its boiling point and can lead to corrosion. It is generally recommended to flush and replace brake fluid every 2 years or 30,000 miles, whichever comes first.

Common Pitfalls: Never use DOT 5 (silicone-based) brake fluid in a system designed for DOT 3, 4, or 5.1, as it is incompatible and can cause seal damage. Always use fresh fluid from a sealed container, as opened brake fluid can absorb moisture from the air.

Power Steering Fluid

The 2021 Jeep Wrangler uses an Electric Power Steering (EPS) system. Therefore, there is no conventional power steering fluid to check or replace.

Washer Fluid

For optimal cleaning and freeze protection, especially in colder climates, use Mopar Windshield Washer Fluid.

Interval: Refill as needed.

Common Pitfalls: In colder climates, avoid using plain water as it can freeze and damage the washer fluid reservoir and pump.

Diesel Exhaust Fluid (DEF

For 2021 Jeep Wranglers equipped with the 3.0L EcoDiesel engine, Diesel Exhaust Fluid (DEF) is required. This fluid must meet ISO 22241 standard (often marketed as AdBlue).

Capacity: The DEF tank capacity is approximately 5.2 gallons (19.7 liters).

Interval: DEF consumption is typically a small percentage of diesel fuel consumption. The vehicle's gauge and warning system will alert you when a refill is needed. Always top off when indicated.

Common Pitfalls: Only use DEF that meets the ISO 22241 standard. Never put DEF in the diesel fuel tank or vice-versa, as this will cause severe and costly damage to the engine's fuel or emissions system. Store DEF in a cool, dry place away from direct sunlight, and do not use DEF past its expiration date or if it has been contaminated.

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