2022 Ram 2500 Fluid Type Specifications

Quick Reference

Understanding the correct fluid specifications for your 2022 Ram 2500 is paramount to ensuring its longevity, performance, and reliability. As an ASE-certified master technician, I can't stress enough the importance of adhering to the manufacturer's recommended fluid types and service intervals. Using the wrong fluid, even once, can lead to costly repairs and compromise the integrity of your truck's sophisticated systems.

Engine Oil

6.4L HEMI V8 (Gasoline):

The 6.4L HEMI engine requires SAE 0W-40 engine oil that meets Mopar Material Standard MS-12633. This specification typically aligns with API SN PLUS or API SP classifications, designed to protect against low-speed pre-ignition (LSPI) in turbocharged and direct-injected engines, although the HEMI is naturally aspirated. The capacity is approximately 7.0 quarts with a filter change. Ram recommends an oil change interval of 10,000 miles or 12 months, whichever comes first, under normal driving conditions. However, if you frequently tow, haul heavy loads, or drive in dusty conditions, more frequent changes (e.g., 5,000 miles or 6 months) are advisable.

6.7L Cummins Turbo Diesel:

For the robust 6.7L Cummins engine, SAE 5W-40 engine oil is specified, meeting Mopar Material Standard MS-10902. This standard corresponds to API CK-4, a heavy-duty diesel engine oil designed to protect newer emissions-controlled diesel engines while maintaining compatibility with older engines. The oil capacity for the Cummins is substantial, at approximately 12.0 quarts with a filter change. The oil change interval for diesel engines can vary significantly based on usage, but typically ranges from 10,000 to 15,000 miles or annually for vehicles equipped with an oil life monitoring system, or around 7,500 miles for severe duty. Always check your owner's manual for the precise interval for your specific use case. Never use gasoline engine oils (API SN, SP, etc.) in your diesel engine, as they lack the necessary additives for diesel engine protection.

Engine Coolant

Your 2022 Ram 2500, regardless of engine, uses a Mopar OAT (Organic Additive Technology) Antifreeze/Coolant. This is typically purple in color and meets Mopar Material Standard MS-90032. The total system capacity can range from 16 to 20 quarts, depending on the engine and optional equipment. It's crucial to only use OAT coolant and never mix it with other coolant types like HOAT (Hybrid Organic Additive Technology) or IAT (Inorganic Additive Technology). Mixing different coolants can lead to chemical reactions that reduce corrosion protection, cause premature wear of water pump seals, and form gel-like deposits that clog the cooling system. While OAT coolant has a long service life (typically 10 years or 150,000 miles), regular inspection of coolant levels and condition is always recommended. When topping off, use only distilled water mixed with concentrated OAT coolant if available, or a pre-mixed 50/50 OAT solution.

Transmission Fluid

6.4L HEMI (8HP75 8-Speed Automatic):

Vehicles equipped with the 8-speed automatic transmission (ZF 8HP75) require a specialized fluid: Mopar ZF 8&9 Speed ATF which is equivalent to ZF LifeguardFluid 8. Given the complexity and precision of this transmission, using the exact specified fluid is non-negotiable. The dry fill capacity is around 6.0-7.0 liters. Transmission fluid is often considered