2018 Ram ProMaster — Fluid Type Specs

Quick Reference

Fluid	Type/Spec	Capacity
Engine Oil	SAE 5W-30 full synthetic meeting FCA MS-13340 or API SP	6.0 quarts (3.6L V6)
Engine Coolant	Mopar OAT (purple) meeting FCA MS-12106	10.5 quarts (3.6L V6)
Transmission Fluid	Mopar ZF 8&9 Speed ATF (8HP/9HP) or equivalent	Verify in owner's manual
Brake Fluid	DOT 3	As needed
Power Steering Fluid	Electric Power Steering (EPS) - no fluid required	N/A
Washer Fluid	-30°F / -34°C Bug & Tar Remover with De-icer	7.0 quarts

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Engine Oil

The 2018 Ram ProMaster with the 3.6L Pentastar V6 engine requires SAE 5W-30 full synthetic engine oil that meets the FCA MS-13340 specification. If an oil meeting this spec is not available, you can use a full synthetic SAE 5W-30 oil that meets the API SP (or a later) standard.

Capacity: 6.0 quarts with filter.

Interval: The oil change interval on the ProMaster is determined by the oil life monitoring system, which will alert you when it's time for a change. However, a good rule of thumb is to not exceed 8,000-10,000 miles or one year, whichever comes first.

Notes: Using the correct oil is critical for the longevity of the Pentastar engine. The MS-13340 spec ensures the oil has the correct viscosity, detergency, and other additives to protect the engine's variable valve timing (VVT) system and other sensitive components. Never use a conventional or synthetic blend oil, as this can lead to sludge formation and premature engine wear.

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Engine Coolant

The ProMaster uses a specific Mopar OAT (Organic Acid Technology) coolant that meets the FCA MS-12106 specification. This coolant is typically purple in color.

Capacity: 10.5 quarts (3.6L V6).

Interval: The factory-fill coolant has a service life of 10 years or 150,000 miles, whichever comes first.

Notes: It is extremely important to only use the specified OAT coolant. Mixing different coolant types (e.g., OAT with HOAT or IAT) can cause the coolant to gel, leading to blockages in the cooling system, overheating, and expensive damage to the engine and radiator. Never use "universal" or "all makes, all models" coolants, as these may not be compatible with the ProMaster's cooling system materials.

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Transmission Fluid

The 2018 ProMaster is equipped with a 6-speed automatic transmission that requires Mopar ZF 8&9 Speed ATF (Automatic Transmission Fluid) or an equivalent fluid that meets the FCA specification. The transmission used in the ProMaster is a variant of the ZF 8HP and 9HP family, although it is a 6-speed in this application.

Capacity: Varies depending on whether you are doing a drain and fill or a complete overhaul. Always verify the correct fluid level using the dipstick or by following the manufacturer's recommended procedure.

Interval: The transmission fluid is considered "fill for life," but it is a good practice to have it inspected and potentially changed every 60,000-100,000 miles, especially if the vehicle is used for heavy hauling or in severe service conditions.

Notes: Using the correct transmission fluid is non-negotiable. The wrong fluid can cause shifting problems, transmission shudder, and ultimately, catastrophic failure. Do not use any other type of ATF, such as ATF+4 or a generic "multi-vehicle" fluid. Always use the genuine Mopar fluid or a high-quality aftermarket equivalent that is specifically formulated for this transmission.

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Brake Fluid

The 2018 Ram ProMaster requires DOT 3 brake fluid. You can also use DOT 4 or DOT 5.1 fluid, as they are compatible with DOT 3 systems. However, never use DOT 5 silicone-based fluid, as it is not compatible and will damage the brake system.

Capacity: The brake system should be filled to the "MAX" line on the reservoir. A complete flush will typically require 1-2 quarts of fluid.

Interval: Brake fluid should be flushed and replaced every 2-3 years, regardless of mileage. Brake fluid is hygroscopic, meaning it absorbs moisture from the air. This moisture can lower the boiling point of the fluid, leading to a spongy brake pedal and reduced braking performance.

Notes: Always use a fresh, unopened bottle of brake fluid. Once a bottle is opened, it will begin to absorb moisture. When bleeding or flushing the brake system, be careful not to get any fluid on the vehicle's paint, as it can cause damage.

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Power Steering Fluid

The 2018 Ram ProMaster is equipped with an Electric Power Steering (EPS) system. This system uses an electric motor to assist the driver with steering, so there is no hydraulic power steering fluid to check or change.

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Washer Fluid

For best results, use a high-quality -30°F / -34°C bug and tar remover with de-icer washer fluid. This will help to keep your windshield clean in all weather conditions and prevent the system from freezing in the winter.

Capacity: 7.0 quarts.

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