2014 Ram 2500 Fluid Specs

Quick Reference: 2014 Ram 2500 Fluid Capacities & Specs

Fluid	Type/Specification	Capacity
Engine Oil (5.7L HEMI V8)	SAE 5W-20 API SN, Chrysler MS-6395	7.0 quarts (6.6L)
Engine Oil (6.4L HEMI V8)	SAE 0W-40 API SN, Chrysler MS-12633	7.0 quarts (6.6L)
Engine Oil (6.7L Cummins)	SAE 15W-40 / 5W-40 (synthetic) API CJ-4/CK-4, CES 20081	12.0 quarts (11.4L)
Engine Coolant	Mopar OAT (Purple), MS-12106	16.2 - 18.2 quarts (15.3 - 17.2L)
Transmission Fluid (66RFE)	Mopar ATF+4, MS-9602	6.5 - 17.5 quarts (Varies)
Transmission Fluid (68RFE)	Mopar ATF+4, MS-9602	7.0 - 17.5 quarts (Varies)
Transmission Fluid (G56)	Mopar ATF+4, MS-9602	6.0 quarts (5.7L)
Transmission Fluid (Aisin AS69RC)	Mopar ASRC ATF	13.5 quarts (12.8L)
Transfer Case (BW 44-46/44-47)	Mopar ATF+4, MS-9602	~2.0 quarts (1.9L)
Front Differential (9.25" AAM)	SAE 75W-90 Synthetic Gear Lubricant	2.3 quarts (2.2L)
Rear Differential (10.5"/11.5" AAM)	SAE 75W-90 Synthetic Gear Lubricant	2.5 - 4.4 quarts (2.4 - 4.2L)
Brake Fluid	DOT 3	As required
Power Steering Fluid	Mopar Electric Steering Pump Fluid or ATF+4	As required
Windshield Washer Fluid	-30°F (-34°C) Washer Fluid	~1.0 gallon (3.8L)
Diesel Exhaust Fluid (DEF)	API Certified (ISO 22241)	9.0 gallons (34L)

---

Engine Oil

Choosing the correct engine oil is the single most important maintenance item for ensuring engine longevity. The 2014 Ram 2500 was available with three different engines, each with a unique oil requirement.

• 5.7L HEMI V8: This engine requires SAE 5W-20 motor oil that meets Chrysler's MS-6395 specification. Most high-quality synthetic blend or full synthetic oils displaying the API "SN" or newer "SP" Starburst will meet this requirement. The capacity is 7.0 quarts.
• 6.4L HEMI V8: The heavy-duty 6.4L (392) HEMI has a more stringent requirement. It calls for a full synthetic SAE 0W-40 oil meeting Chrysler's MS-12633 spec. Using the correct spec is vital for the proper function of the Multi-Displacement System (MDS). The capacity is 7.0 quarts.
• 6.7L Cummins Turbodiesel: Diesel engines require robust oils designed to handle soot and high compression. For the Cummins, use a high-quality diesel oil such as SAE 15W-40. In climates where temperatures are consistently below 0°F (-18°C), a synthetic SAE 5W-40 is recommended for better cold-start performance. The oil must meet API CJ-4 (or the superseding CK-4) and Cummins CES 20081 specifications. The oil capacity is a substantial 12.0 quarts.

Engine Coolant (Antifreeze)

All 2014 Ram 2500 trucks, regardless of engine, use a specific Organic Acid Technology (OAT) coolant. It must meet Chrysler's MS-12106 specification. This Mopar OAT coolant is typically purple in color.

CRITICAL NOTE: Do NOT mix this with other coolant types. Do not use "universal" coolants. Mixing OAT with HOAT (Hybrid Organic Acid Technology, used in prior model years and often orange/pink) or IAT (green) coolants can cause it to gel, leading to clogged heater cores, radiators, and catastrophic engine overheating. The system capacity ranges from 16 to 18 quarts, so always purchase a sufficient amount of 50/50 prediluted or concentrated coolant and distilled water for a full flush.

Transmission Fluid

• 66RFE & 68RFE Automatic (Gas & Diesel): These common 6-speed automatic transmissions both require Mopar ATF+4, which meets Chrysler specification MS-9602. This is a specific synthetic fluid. Do not use Dexron/Mercon or generic "Multi-Vehicle" ATF. A fluid and filter change (pan drop) uses around 6-8 quarts, while a full system flush requires up to 17.5 quarts.
• Aisin AS69RC Automatic (High-Output Diesel): Trucks equipped with the high-output Cummins option feature the Aisin transmission, which requires its own specific fluid: Mopar ASRC Automatic Transmission Fluid. Do not substitute ATF+4 in this transmission.
• G56 Manual Transmission: If you have a rare manual-equipped Cummins, the G56 transmission also uses automatic transmission fluid—specifically Mopar ATF+4.

Transfer Case Fluid

For 4WD models, the BorgWarner transfer case (models 44-46 or 44-47) is lubricated with Mopar ATF+4, the same fluid used in the 68RFE automatic transmission. The capacity is approximately 2 quarts.

Differential Fluid

• Front Axle (9.25" AAM): All 4WD trucks use SAE 75W-90 Synthetic Gear Lubricant in the front differential.
• Rear Axle (10.5" or 11.5" AAM): The rear axle also specifies SAE 75W-90 Synthetic Gear Lubricant. If the truck is equipped with a limited-slip differential (LSD), a limited-slip additive must be included. Many synthetic gear oils already contain this friction modifier, but it is critical to verify on the bottle. If not pre-mixed, you must add it separately.

Brake & Power Steering Fluid

• Brake Fluid: The hydraulic brake system requires DOT 3 brake fluid. If you are flushing the system or operate in a high-performance or heavy towing scenario, DOT 4 is an acceptable upgrade, but the two should not be mixed. Never use DOT 5 (silicone-based) fluid.
• Power Steering Fluid: The 2014 Ram 2500 uses an electro-hydraulic power steering system. It requires a special Mopar Electric Steering Pump Fluid. However, in many cases, ATF+4 is also an acceptable fluid. Always verify with your owner's manual or OEM service information before topping off.

Other Fluids

• Windshield Washer Fluid: Use any high-quality commercial washer solvent, preferably one rated for protection down to -30°F (-34°C) to prevent freezing in winter.
• Diesel Exhaust Fluid (DEF) (6.7L Cummins): Cummins-powered trucks require Diesel Exhaust Fluid to meet emissions standards. Use only API Certified DEF that meets the ISO 22241 specification. Using low-quality or contaminated DEF can damage the expensive SCR (Selective Catalytic Reduction) system. The DEF tank holds 9 gallons.

Find a trusted shop on Repairius.