OILCHANGEDIY

2018 Ram 3500

Maintenance & specsVERIFIED Jun 13, 2026
Engine Oil
5W-20
Full Synthetic
OEM spec · MS-6395Buy oil
Capacity
8qt
with filter
7.7 qt without filter
Oil Filter
4892339AB
Mopar (OEM)
OEM spec: MS-6395

The 2018 Ram 3500 takes 5W-20 Full Synthetic with a total capacity of 8 quarts (filter included). The OEM oil filter is the Mopar 4892339AB, with 4 compatible alternatives listed below. Below you’ll find complete maintenance specs, fluid capacities, parts, and links to buy what you need.

⚑ QUICK DIY TIPS FOR THE 2018 RAM 3500
  • Using the OEM filter (Mopar 4892339AB) is recommended for warranty compliance.
  • Always use 5W-20 Full Synthetic as specified by Ram — using the wrong viscosity can void your powertrain warranty.
01

Oil & Filter

OilBuy
Viscosity5W-20
Oil typeFull Synthetic
Capacity (with filter)8 qt
Capacity (w/o filter)7.7 qt
OEM specMS-6395
Filter Options
Mopar4892339ABOEM
Buy
Wix57060
Buy
FleetguardLF16035OEM
Buy
Mopar5083285AA
Buy
DonaldsonP550425
Buy
OEM oil filter for 6.4L HEMI
Drain Bolt & Hardware

Drain bolt specs not yet added.

07

Technical Service Bulletins

336
08

Tools & Supplies

Oil Drain Pan
Catch the old oil cleanly
Shop on Amazon
Funnel
Spill-free refill
Shop on Amazon
Socket Wrench
For the drain plug
Shop on Amazon
5W-20 Oil
8+ quarts
Shop on Amazon
Shop parts for the Ram 3500
Find oil, filters, and maintenance parts for the 2018 Ram 3500 on Amazon.
Shop parts ↗
Step-by-step guide
Detailed walkthrough with tips for first-timers.
Read guide
How often to change oil
Intervals, severe service, and what your car needs.
Read guide
Synthetic vs. conventional
Which oil type is right for your engine and budget.
Read guide
Other 2018 Ram models
Other Ram 3500 years
Have info for this vehicle?
Help fellow owners — submit specs from your owner's manual.
Submit specs
ⓘAs an Amazon Associate, OilChangeDIY.com earns from qualifying purchases. Product links on this page may be affiliate links. See our affiliate disclosure for details. Always double-check specs against your owner's manual or official OEM documentation.