Complete Oil Specifications
Your 2023 Ram 2500 6.4L HEMI requires full synthetic 0W-20 motor oil meeting Stellantis material standard MS-6395. (Note: DO NOT use 0W-40 in the 2023 6.4L truck engine—that is specific to the SRT/performance car variants!)
Quick Reference
| Specification | Value |
|---|---|
| Viscosity | 0W-20 |
| API Rating | SP |
| ILSAC Rating | GF-6A |
| Capacity (with filter) | 7.4 quarts |
| Oil Filter | Mopar MO-339 |
| Normal Interval | 8000 miles |
Why 0W-20 is Critical for This Engine
The heavy-duty 6.4L HEMI V8 relies on precise oil pressure and flow to operate its Multi-Displacement System (MDS) smoothly, which deactivates cylinders to conserve fuel while cruising. The 0W-20 weight is required to activate these sophisticated hydraulic lifters at the exact intended millisecond, while simultaneously offering the highest fuel economy.
Using incorrect oil will:
- ❌ Prevent the Multi-Displacement System (MDS) from engaging or disengaging correctly, causing check engine lights
- ❌ Induce valvetrain ticking or lifter failure to which the HEMI architecture can be sensitive if lubrication is sluggish
- ❌ Void the manufacturer’s powertrain warranty
Ram-Approved Oil Brands
-
✅ Pennzoil Platinum Full Synthetic 0W-20
-
✅ Valvoline Advanced Full Synthetic 0W-20
-
✅ Mobil 1 Advanced Full Synthetic 0W-20
-
✅ Castrol EDGE 0W-20 Advanced Full Synthetic
-
✅ Mopar Full Synthetic 0W-20
FCA/Stellantis heavily recommends Pennzoil products, but any API SP oil that carries explicitly the MS-6395 certification on the bottle’s rear label is fully approved.
Severe Service Check
You need the 4000-mile interval if you:
- Engage in frequent off-roading or dusty environment driving
- Idle extensively (such as fleet or construction site work)
- Haul maximum payloads or heavily tow in hilly, hot climates
- Drive short distances (under 5-10 miles) repeatedly in very cold weather
Installation Details
Drain Plug Torque: 20 ft-lbs
OEM Filter: Mopar MO-339
Aftermarket Filters:
-
Wix 57060
-
Mobil 1 M1-113A
-
K&N HP-1017
Pro Tip: HEMI engines can suffer from poor oil drainage during the change if the truck is improperly tilted. Try to drain on a flat level surface to ensure all 7.4 quarts are evacuated.
FAQs
What oil does a 2023 Ram 2500 6.4L take?
It requires 0W-20 full synthetic motor oil meeting API SP combined with the Chrysler MS-6395 standard.
How many quarts does it need?
7.4 quarts when completing a full drop of the oil alongside a new oil filter. Avoid older conversion errors reporting this as exactly 7 quarts.
Can I use the 0W-40 oil I see suggested for the 6.4L Scat Pack?
No! The SRT car versions of the 392/6.4L HEMI use 0W-40, but the heavy-duty truck configuration of the 6.4L specifically takes 0W-20. Never mix them up.
How often should I change the oil?
Never exceed 8000 miles, 12 months, or 350 hours of engine runtime, whichever comes first. Rely heavily on the truck’s Oil Life Indicator.
Need these specs on your phone? Download OilFinderPro app for offline access and oil change reminders.
Last verified: 2026-03-17 | Source: 2023 Ram 2500 Heavy Duty Owner’s Manual