2020 Ram 1500 Fluid Type Specifications

Quick Reference

Fluid	Type/Spec	Capacity
Engine Oil	5W-20 (5.7L HEMI) / 0W-20 (3.6L Pentastar)	7.0 quarts (5.7L) / 5.5 quarts (3.6L)
	Mopar MS-6395 (API SN/SP equivalent)
Engine Coolant	Mopar OAT (Organic Additive Technology) MS-90032	14.0 quarts (5.7L) / 10.0-12.0 quarts (3.6L)
	(Purple/Pink)
Transmission Fluid	Mopar ATF+4 (ZF 8HP Transmission)	5.0-6.0 quarts (drain/fill) / 9.0-10.0 quarts (overhaul)
Transfer Case	Mopar ATF+4 (BW 48-11, BW 48-12)	1.5 quarts (approx.)
Front Differential	Mopar 75W-85 GL-5 (Non-eLocker)	1.0-1.2 quarts (approx.)
	Mopar 75W-140 GL-5 (eLocker)
Rear Differential	Mopar 75W-85 GL-5 (Non-LSD)	2.0-2.5 quarts (approx.)
	Mopar 75W-140 GL-5 + Friction Modifier (LSD)
Brake Fluid	Mopar DOT 3 or DOT 4	As needed
Power Steering	Electric power steering - no fluid required	N/A
Washer Fluid	Mopar Windshield Washer Concentrate	As needed
DEF (Diesel Exhaust Fluid)	ISO 22241 (for 3.0L EcoDiesel)	5.0 gallons (approx.)

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Engine Oil

For the 2020 Ram 1500, engine oil specifications vary based on the engine. For the popular 5.7L HEMI V8, the factory fill and recommended oil is 5W-20, meeting Mopar Material Standard MS-6395. This standard generally aligns with API SN or SP specifications. The capacity for the 5.7L HEMI is approximately 7.0 quarts with a filter change.

For models equipped with the 3.6L Pentastar V6 engine, the recommended engine oil is 0W-20, also meeting Mopar MS-6395. The capacity for the 3.6L Pentastar is around 5.5 quarts with a filter change.

It is crucial to use oil that meets the specified Mopar MS-6395 standard to ensure optimal engine performance, longevity, and to maintain warranty compliance. Always check your owner's manual for the most accurate and up-to-date information, as specifications can sometimes have minor revisions.

Intervals and Pitfalls: Engine oil and filter changes are typically recommended every 10,000 miles or 12 months, whichever comes first, under normal driving conditions. However, the Ram 1500 also features an Oil Change Indicator System that monitors driving conditions and adjusts the oil change interval accordingly. For vehicles frequently towing, idling, or operating in extreme conditions, more frequent oil changes may be necessary. Using an incorrect oil weight or a non-compliant oil (one not meeting MS-6395) can lead to premature engine wear, reduced fuel economy, and potential engine damage.

Engine Coolant

The 2020 Ram 1500 utilizes a Mopar OAT (Organic Additive Technology) coolant, specifically meeting Mopar Material Standard MS-90032. This coolant is typically purple or pink in color. It is a long-life coolant designed for extended service intervals.

Coolant capacity for the 5.7L HEMI is approximately 14.0 quarts, while the 3.6L Pentastar holds around 10.0 to 12.0 quarts. Always consult your owner's manual for exact capacities as they can vary slightly with different cooling system configurations.

Intervals and Pitfalls: OAT coolants are typically designed for extended service intervals, often lasting 10 years or 150,000 miles. However, it's always best to refer to your owner's manual for the specific replacement schedule. A critical pitfall is mixing different types of coolants. Mixing OAT coolants with older HOAT (Hybrid Organic Additive Technology) or IAT (Inorganic Additive Technology) coolants can lead to chemical reactions, resulting in gel formation, corrosion, and severe damage to the cooling system and engine. Always use distilled water if mixing concentrate, and avoid tap water due to mineral content.

Transmission Fluid

For the 2020 Ram 1500, equipped with the ZF 8HP automatic transmission, the required transmission fluid is Mopar ATF+4. This is a highly specific fluid, and substituting it with generic or "universal" ATF can cause significant transmission issues and damage. The typical capacity for a drain and fill is around 5.0 to 6.0 quarts, while an overhaul or dry fill can be closer to 9.0 to 10.0 quarts.

Intervals and Pitfalls: Unlike older transmissions, many modern sealed transmissions, including the ZF 8HP, often have "lifetime fill" claims from the manufacturer. However, service professionals generally recommend fluid and filter changes between 60,000 and 100,000 miles, especially for vehicles that frequently tow, haul heavy loads, or drive in demanding conditions. Ignoring transmission fluid changes can lead to increased wear, harsh shifting, and premature transmission failure. Never use a universal ATF or any fluid not explicitly stating compliance with Mopar ATF+4.

Transfer Case

For 4WD and AWD 2020 Ram 1500 models, the transfer case (e.g., BorgWarner BW 48-11, BW 48-12) generally specifies Mopar ATF+4. This is the same fluid used in the automatic transmission. The capacity is approximately 1.5 quarts.

Intervals and Pitfalls: Transfer case fluid is typically recommended for inspection or replacement every 30,000 to 60,000 miles, particularly for vehicles used for towing or off-road driving. Neglecting transfer case fluid can lead to excessive wear of internal components and potential failure of the 4WD/AWD system. Always verify the specific transfer case model in your owner's manual and use the recommended Mopar ATF+4.

Front Differential

The front differential on the 2020 Ram 1500 typically uses Mopar 75W-85 GL-5 gear oil for non-eLocker equipped vehicles. The capacity is usually around 1.0 to 1.2 quarts. For models equipped with an electronic locking differential (eLocker), the specification may call for Mopar 75W-140 GL-5.

Intervals and Pitfalls: Differential fluid service intervals are often every 30,000 to 60,000 miles, especially for vehicles that frequently tow, haul, or operate in extreme temperatures. Using the incorrect weight or specification of gear oil can lead to premature wear of gears and bearings. Always confirm the differential type (open, limited-slip, or eLocker) and the correct fluid in your owner's manual.

Rear Differential

Similar to the front differential, the rear differential on the 2020 Ram 1500 has varying specifications. For open (non-limited-slip) differentials, Mopar 75W-85 GL-5 gear oil is typically specified. Capacity is usually in the range of 2.0 to 2.5 quarts.

For rear differentials equipped with a Limited-Slip Differential (LSD), Mopar 75W-140 GL-5 is generally required, and it is crucial to use an appropriate friction modifier additive to prevent chatter and ensure proper LSD operation. Some 75W-140 fluids come with the friction modifier already included; otherwise, it needs to be added separately. Vehicles with an electronic locking differential (eLocker) may also utilize 75W-140 GL-5 without the need for a friction modifier.

Intervals and Pitfalls: Rear differential fluid should be serviced at similar intervals to the front differential. For LSDs, failure to use the correct friction modifier will result in noticeable shuddering or chattering during turns. Using the wrong fluid type or failing to add friction modifier will damage the differential and compromise its function.

Brake Fluid

The 2020 Ram 1500 typically uses either Mopar DOT 3 or DOT 4 brake fluid. It is essential to check your owner's manual or the cap on the master cylinder reservoir to confirm the exact specification. DOT 4 has a higher wet and dry boiling point than DOT 3, offering slightly better performance under sustained heavy braking, but both are glycol-based and compatible in systems designed for them.

Intervals and Pitfalls: Brake fluid is hygroscopic, meaning it absorbs moisture from the air over time. This moisture content lowers the fluid's boiling point, which can lead to a soft or spongy brake pedal and reduced braking effectiveness, especially during hard braking. It is generally recommended to flush and replace brake fluid every 2 years or 30,000 miles. Never use DOT 5 (silicone-based) fluid in a system designed for DOT 3/4/5.1, as DOT 5 is not compatible and can severely damage the braking system components.

Power Steering Fluid

All 2020 Ram 1500 models are equipped with an electric power steering (EPS) system. Therefore, there is no conventional power steering fluid to check or replace. The system is electronically controlled and motor-driven, eliminating the need for hydraulic fluid.

Washer Fluid

The windshield washer system uses standard automotive windshield washer fluid. For optimal performance, especially in colder climates, it is recommended to use a high-quality fluid like Mopar Windshield Washer Concentrate mixed with water, or a pre-mixed, all-season washer fluid with freeze protection. Ensure the fluid is suitable for your local climate conditions.

Intervals and Pitfalls: Washer fluid should be topped off as needed. A common pitfall is using plain water, especially in freezing temperatures, which can freeze in the reservoir, lines, or pump, causing damage. Avoid using household glass cleaners, as they can contain ammonia or other chemicals that may damage the vehicle's paint, wiper blades, or plastic components.

Diesel Exhaust Fluid (DEF)

For 2020 Ram 1500 models equipped with the 3.0L EcoDiesel engine, Diesel Exhaust Fluid (DEF) is required. DEF is an aqueous urea solution used in Selective Catalytic Reduction (SCR) systems to reduce nitrogen oxide (NOx) emissions. The DEF used must meet the ISO 22241 standard. The DEF tank capacity is approximately 5.0 gallons.

Intervals and Pitfalls: DEF consumption varies based on driving conditions, but the vehicle's gauge will indicate when a refill is needed. It is crucial to only use DEF that meets the ISO 22241 standard. Do not use any other fluid as a substitute, as it will damage the SCR system and render the vehicle inoperable. DEF has a shelf life, typically around 1-2 years, and should be stored in a cool, dry place. Contamination with fuel, oil, or even water can severely damage the SCR system.

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