2024 Ram 2500 Fluid Type Specs

Quick Reference

Fluid	Type/Spec	Capacity
Engine Oil	6.4L HEMI (Gasoline): SAE 0W-20, Mopar MS-6395	7.0 US Quarts (6.6 Liters)
	6.7L Cummins (Diesel): SAE 5W-40, API CK-4/CJ-4, Mopar MS-10902	12.0 US Quarts (11.4 Liters)
Engine Coolant	Mopar Antifreeze/Coolant 10 Year/150,000 Mile Formula HOAT (Hybrid Organic Acid Technology), Purple in color, Mopar MS-90032	16.0 - 20.0 US Quarts (15.1 - 18.9 Liters)
Transmission Fluid	8HP75 (Gasoline): Mopar ZF 8&9 Speed ATF, Mopar MS-9602	6.0 - 9.0 US Quarts (5.7 - 8.5 Liters)
	68RFE (Diesel): Mopar ATF+4, Mopar MS-9602	17.5 US Quarts (16.5 Liters)
Transfer Case	BW 44-46/44-48: Mopar ATF+4, Mopar MS-9602	1.6 - 1.8 US Quarts (1.5 - 1.7 Liters)
Front Differential	11.5 AAM: SAE 75W-85, API GL-5, Mopar MS-90033	2.5 - 3.0 US Quarts (2.3 - 2.8 Liters)
	9.25 AAM: SAE 75W-90, API GL-5, Mopar MS-90033	2.2 - 2.5 US Quarts (2.0 - 2.3 Liters)
Rear Differential	11.5 AAM: SAE 75W-85, API GL-5, Mopar MS-10902 (with LSD additive if equipped)	3.5 - 4.0 US Quarts (3.3 - 3.7 Liters)
	12.0 AAM: SAE 75W-90, API GL-5, Mopar MS-10902 (with LSD additive if equipped)	4.0 - 4.5 US Quarts (3.7 - 4.2 Liters)
Brake Fluid	Mopar DOT 3 or DOT 4, Mopar MS-90035	As needed
Power Steering	Mopar ATF+4, Mopar MS-9602	1.0 - 1.5 US Quarts (0.9 - 1.4 Liters)
Washer Fluid	Mopar Windshield Washer Concentrate or equivalent	1.0 US Gallon (3.8 Liters)
Diesel Exhaust Fluid (DEF)	API Certified DEF, ISO 22241	5.0 US Gallons (18.9 Liters)

Engine Oil

6.4L HEMI Gasoline Engine: For the 2024 Ram 2500 equipped with the 6.4L HEMI V8 gasoline engine, the factory-recommended engine oil is SAE 0W-20. It must meet Chrysler Material Standard MS-6395. Always look for this specification on the oil bottle to ensure compatibility. The oil capacity for this engine is approximately 7.0 US quarts (6.6 liters) with a filter change. Ram recommends oil and filter changes every 10,000 miles or 12 months, or sooner under severe driving conditions (towing, extreme temperatures, dusty environments). Using an oil that does not meet the MS-6395 specification can lead to premature engine wear and potential warranty voidance.

6.7L Cummins Turbo Diesel Engine: For the 2024 Ram 2500 with the 6.7L Cummins turbo diesel engine, the specified engine oil is SAE 5W-40, meeting API CK-4 or CJ-4 classifications. Look for the Mopar MS-10902 specification. The larger capacity of this engine is approximately 12.0 US quarts (11.4 liters) with a filter change. Diesel engine oil capacity is significantly higher due to the increased demands of a compression-ignition engine. Oil change intervals for the Cummins engine can vary based on the vehicle's onboard maintenance system, but typically range from 15,000 miles to 20,000 miles, or 12 months, or 500 hours, whichever comes first. Always verify the exact interval through the vehicle's oil life monitoring system or the owner's manual. Using an incorrect oil type can lead to issues with the diesel particulate filter (DPF) and other emissions equipment.

Engine Coolant

The 2024 Ram 2500 utilizes Mopar Antifreeze/Coolant 10 Year/150,000 Mile Formula, which is a Hybrid Organic Acid Technology (HOAT) coolant. This coolant is purple in color and meets Mopar Material Standard MS-90032. The overall cooling system capacity is generally between 16.0 and 20.0 US quarts (15.1 and 18.9 liters), varying slightly by engine and cab configuration. It is crucial to use only HOAT coolant. Mixing different coolant technologies, such as OAT (Organic Acid Technology) or traditional IAT (Inorganic Acid Technology) coolants, can cause chemical reactions that lead to sludge formation, corrosion, and severe cooling system damage. Inspect the coolant level and condition regularly, especially when towing. The coolant should be replaced every 10 years or 150,000 miles, whichever comes first.

Transmission Fluid

8HP75 Automatic Transmission (Gasoline): The 8-speed automatic transmission paired with the 6.4L HEMI engine requires Mopar ZF 8&9 Speed ATF, which meets Mopar Material Standard MS-9602. The fluid capacity for a pan drop and filter change is typically 6.0-9.0 US quarts (5.7-8.5 liters), but a complete flush will require more. This transmission is a sophisticated unit, and using any fluid other than the specified type can lead to shuddering, slippage, and eventually, transmission failure. Consult your owner's manual for specific maintenance schedules, as these transmissions are often considered "filled for life" under normal conditions, but fluid changes are recommended for severe duty operation, such as frequent towing.

68RFE Automatic Transmission (Diesel): The 6-speed automatic transmission found with the 6.7L Cummins engine uses Mopar ATF+4, also meeting Mopar Material Standard MS-9602. The total fill capacity for this transmission is around 17.5 US quarts (16.5 liters). Mopar ATF+4 is a highly specific synthetic fluid developed for Chrysler Group vehicles and should not be substituted with "universal" ATFs, as these may not meet the exacting friction modifiers and viscosity requirements of the 68RFE. Transmission fluid and filter changes are generally recommended every 60,000 miles under normal driving conditions, or more frequently if towing or operating in severe conditions. Regular fluid changes help extend the life of the transmission.

Transfer Case

The 2024 Ram 2500 utilizes BorgWarner transfer cases (BW 44-46 or BW 44-48). Both require Mopar ATF+4, which meets Mopar Material Standard MS-9602. The capacity is typically between 1.6 and 1.8 US quarts (1.5 and 1.7 liters). As with the 68RFE transmission, using Mopar ATF+4 is critical for proper operation and longevity of the transfer case. Never use gear oil in these transfer cases. Fluid changes are commonly recommended every 30,000 miles for optimal performance, especially for vehicles frequently used in 4WD or for towing.

Differential Fluid

Front Differentials: Ram 2500 trucks can be equipped with either the 11.5 AAM or 9.25 AAM front axle. Both require SAE 75W-85 or 75W-90, API GL-5 specified gear oil. The general specification is Mopar MS-90033. Capacities range from 2.2 to 3.0 US quarts (2.0 to 2.8 liters), depending on the specific axle.

Rear Differentials: Common rear axles include the 11.5 AAM and 12.0 AAM. These typically require SAE 75W-85 or 75W-90, API GL-5 specified gear oil, meeting Mopar MS-10902. Importantly, if your Ram 2500 is equipped with a limited-slip differential (LSD), you MUST use a gear oil that contains an LSD additive or add a separate friction modifier. Failing to do so will result in chatter and reduced effectiveness of the LSD. Capacities range from 3.5 to 4.5 US quarts (3.3 to 4.2 liters). Differential fluid is generally recommended for replacement every 30,000-60,000 miles depending on use, with severe duty (towing, off-roading) warranting more frequent changes.

Brake Fluid

The 2024 Ram 2500 uses either Mopar DOT 3 or DOT 4 brake fluid, meeting Mopar Material Standard MS-90035. DOT 4 has a higher boiling point and is generally preferred for heavy-duty applications or vehicles that experience frequent or hard braking. Never use DOT 5 (silicone-based) brake fluid, as it is incompatible with the ABS system and seals in vehicles designed for DOT 3 or DOT 4. Brake fluid is hygroscopic, meaning it absorbs moisture over time, which lowers its boiling point and can lead to corrosion in the brake system. It is generally recommended to flush the brake fluid every 2-3 years, or every 30,000 miles, to maintain optimal braking performance and system integrity.

Power Steering Fluid

For the 2024 Ram 2500, the power steering system uses Mopar ATF+4, which meets Mopar Material Standard MS-9602. This is the same fluid specified for the 68RFE transmission and many transfer cases. Using any other type of fluid can lead to pump whine, steering issues, and premature component failure. The capacity is typically around 1.0 to 1.5 US quarts (0.9 to 1.4 liters). While not always explicitly listed as a service item, flushing the power steering fluid every 60,000 miles can help prevent issues, especially in trucks that see heavy use.

Washer Fluid

Any commercially available windshield washer fluid concentrate or pre-mixed solution is suitable for the 2024 Ram 2500. Mopar Windshield Washer Concentrate is recommended. It is advisable to use fluids with antifreeze properties in colder climates to prevent freezing and ensure visibility. The washer fluid reservoir typically holds about 1.0 US gallon (3.8 liters).

Diesel Exhaust Fluid (DEF)

For 2024 Ram 2500 models equipped with the 6.7L Cummins diesel engine, Diesel Exhaust Fluid (DEF) is essential for the Selective Catalytic Reduction (SCR) system to reduce nitrogen oxide (NOx) emissions. DEF must be API Certified and meet ISO 22241 specifications. The DEF tank typically has a capacity of approximately 5.0 US gallons (18.9 liters). It's crucial to only use high-quality, certified DEF. Using non-compliant DEF, or contaminating the DEF tank with other fluids, can severely damage the SCR system and lead to costly repairs. The vehicle's display will provide warnings when the DEF level is low. Always refill with fresh DEF from a sealed container. DEF has a shelf life, so avoid using products that have been stored for extended periods or exposed to extreme temperatures.

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