2020 Ram ProMaster Oil Capacity, Viscosity & Filter Specs

The 2020 Ram ProMaster requires exactly 6.0 quarts (5.6 liters) of 5W-20 engine oil when performing a standard oil change with a filter replacement. As an ASE-certified master technician, I can tell you that keeping up with the exact specifications for your ProMaster’s 3.6L Pentastar V6 is critical for keeping this workhorse on the road and out of the shop.

Below is everything you need to know about servicing the engine oil on your 2020 Ram ProMaster.

Quick answer

• Oil Capacity: 6.0 quarts (5.6 liters) with filter replacement.
• Recommended Weight / Viscosity: SAE 5W-20.
• Oil Specification: API Certified SN or SP, meeting Chrysler MS-6395 standards.
• OEM Oil Filter: Mopar MO-349 (Part Number 68191349AC) – Note: This is a cartridge-style filter.
• Aftermarket Oil Filters:
  • FRAM CH11665
  • WIX WL10010
  • Mobil 1 M1C-254A

Capacity by engine option

For the 2020 model year, Ram simplified the ProMaster lineup by offering only one engine option in the United States: the proven 3.6-liter Pentastar V6. The diesel option available in earlier years was discontinued.

Oil change interval

Your 2020 Ram ProMaster is equipped with an automatic Oil Life Indicator system, which calculates the oil degradation based on your driving habits, engine temperatures, and trip lengths. However, you should still follow these baseline intervals:

• Normal Duty: Replace oil and filter when prompted by the indicator, not to exceed 10,000 miles or 12 months, whichever comes first.
• Severe Duty: If you frequently idle for extended periods, drive in dusty environments, or haul heavy cargo (common for commercial vans), the indicator may prompt you sooner. For severe commercial use, many technicians recommend dropping the interval to 5,000 to 7,500 miles or every 6 months to prevent premature valvetrain wear.

Drain plug torque

• Torque Spec: 20 ft-lbs (27 Nm).
• Tool Required: 13mm socket or wrench.
• Note on Sealing: The ProMaster oil pan drain plug features an integrated rubber O-ring seal rather than a traditional crush washer. Inspect this rubber seal during every oil change. If the rubber is flattened, cracked, or missing, replace the entire drain plug.

How to change the oil

Servicing the 2020 ProMaster is straightforward, especially since the oil filter is accessed from the top of the engine bay.

1. Warm the Engine: Run the engine for a few minutes to warm the oil, allowing it to flow out faster and suspend any contaminants.
2. Access the Filter: Open the hood and locate the oil filter housing cap on the top of the engine (driver's side). Loosen it with a 24mm socket to allow the oil in the housing to drain down into the pan. Do not fully remove it yet.
3. Drain the Oil: Safely raise and support the front of the van if necessary (though many have enough ground clearance to slide underneath). Place a drain pan under the oil pan and remove the 13mm drain plug.
4. Replace the Filter: While the oil is draining, go back up top and fully remove the oil filter cap. Pull out the old cartridge filter. Discard the old O-ring on the cap, lubricate the new O-ring (included with your new filter) with fresh oil, and install it. Snap the new filter cartridge into the cap and torque the cap to 18 ft-lbs (25 Nm). Do not overtighten!
5. Reinstall Drain Plug: Once the draining slows to a drip, reinstall the drain plug and torque to 20 ft-lbs.
6. Refill and Check: Add 6.0 quarts of 5W-20 oil. Start the engine, check for leaks at the filter housing and drain plug, then turn it off. Wait five minutes and verify the fluid level on the dipstick.
7. Reset Oil Life Monitor: Turn the ignition to the ON/RUN position (do not start the engine). Fully depress the accelerator pedal slowly three times within 10 seconds. Turn the ignition OFF.

Common issues / tips

• Oil Filter Housing Leaks: The 3.6L Pentastar engine is notorious for oil cooler/oil filter housing leaks. The housing is made of plastic and sits in the engine "valley." Overtightening the oil filter cap is the number one cause of cracking this housing. Always use a torque wrench and stop at 18 ft-lbs. If you notice oil pooling on top of the engine block or running down the back of the transmission, the housing assembly likely needs replacement.
• Cartridge Filter Tip: Make sure the "nipple" on the bottom of the cartridge filter aligns perfectly with the hole in the housing. Forcing the cap down on a misaligned filter will crush the filter and starve the engine of oil.
• Viscosity Choice: Stick with 5W-20. The Pentastar engine utilizes Variable Valve Timing (VVT) solenoids that rely on proper oil pressure and flow to operate. Using thicker oil like 10W-30 can trigger check engine lights and cause VVT performance codes.

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