For the 2018 Ram ProMaster 3500 equipped with the 3.0L 4-cylinder Diesel Turbo (Engine Code D), the required oil viscosity is 5W-30. The engine oil capacity is 9.5 quarts when performing a change with a new filter. AMSOIL recommends AMSOIL 5W-30 100% Synthetic Diesel Oil (DP530QT-EA) for outstanding protection in this diesel application.
What oil does a 2018 Ram ProMaster 3500 3.0L Diesel take?
The 2018 Ram ProMaster 3500 with the 3.0L 4-cylinder diesel engine requires an oil viscosity of 5W-30 for all temperatures. The AMSOIL lookup identifies the SEO54 oil grade for this application. For optimal protection, AMSOIL recommends their 100% Synthetic Diesel Oil.
AMSOIL product recommendations
Based on the AMSOIL lookup for your 2018 Ram ProMaster 3500, the following products are recommended to maintain engine and component health.
Engine Oil & Filters
| Product Name | Part Code |
|---|---|
| AMSOIL 5W-30 100% Synthetic Diesel Oil | DP530QT-EA |
Note: No specific oil filter recommendations are available from the source data.
Coolant & Antifreeze
| Product Name | Part Code |
|---|---|
| AMSOIL Passenger Car & Light Truck Antifreeze & Coolant | ANTPC1G-EA |
| AMSOIL Propylene Glycol Antifreeze and Engine Coolant | ANT1G-EA |
Transmission Fluids
| Product Name | Part Code |
|---|---|
| AMSOIL Signature Series Multi-Vehicle 100% Synthetic ATF | ATFPK-EA |
| AMSOIL OE Multi-Vehicle 100% Synthetic ATF | OTFQT-EA |
| AMSOIL 75W-90 Manual Transmission & Transaxle Gear Lube | MTGPK-EA |
Brake & Steering Fluids
| Product Name | Part Code |
|---|---|
| AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid | BFLVCN-EA |
| AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid | PSFCN-EA |
Diesel Fuel Additives
| Product Name | Part Code |
|---|---|
| AMSOIL Diesel Injector Clean Fuel Additive | ADFPCN-EA |
| AMSOIL Diesel Cetane Boost Fuel Additive | ACBCN-EA |
| AMSOIL Diesel Injector Clean + Cetane Boost Fuel Additive | ADSCN-EA |
Engine Oil Specifications
| Attribute | Specification/Value |
|---|---|
| Viscosity | 5W-30 (All TEMPS) |
| AMSOIL Lookup Oil Grade | SEO54 |
How much oil does it take with a filter change?
The engine requires 9.5 quarts of oil when replacing the filter. It is important to check the oil level after refilling.
Engine Oil Service Details
| Component | Specification/Torque |
|---|---|
| Oil Drain Plug Torque | 33 ft/lbs |
Maintenance Note: When servicing the drain plug, install a new washer on the drain bolt. Only use an OE drain plug.
Transmission and Drivetrain Specifications
The 2018 Ram ProMaster 3500 features different requirements for automatic and manual transmission configurations. Ensure you identify your specific transmission type before purchasing fluids.
Automatic Transmission (62TE)
| Fill Type | Capacity |
|---|---|
| Initial Fill | 5.5 quarts |
| Total Fill (6-speed 62TE) | 9 quarts |
Manual Transmission (M40MTA)
| Attribute | Specification/Value |
|---|---|
| Viscosity Requirement | GL-4 All TEMPS 75W-85 |
| Transmission Portion Capacity | 6.1 pints |
| Drain Plug Torque | 37 ft/lbs |
| Fill Plug Torque | 37 ft/lbs |
Note: The manual transmission requires a synthetic-based oil.
Cooling System Maintenance
Maintaining the cooling system is vital for diesel engine longevity. The 2018 Ram ProMaster 3500 has a specific coolant capacity and requirements.
| Component | Capacity |
|---|---|
| Coolant Capacity | 12.7 quarts |
The AMSOIL lookup lists two options: a 50/50 pre-mix Ethylene glycol formulation (ANTPC1G-EA) and a concentrated Propylene Glycol formulation (ANT1G-EA) which requires mixing with distilled or high-quality water.
Common diesel oil-related concerns and how AMSOIL products may help
| Concern | Why it matters | AMSOIL product from this lookup | How it may help | Important limitation |
|---|---|---|---|---|
| Diesel Injector Deposits | Dirty injectors can reduce efficiency and power. | ADFPCN-EA | Cleans dirty injectors and lubricates pumps. | Diagnosis or repair may still be required. |
| Low Cetane Levels | Affects combustion quality, startability, and idle smoothness. | ACBCN-EA | Increases cetane up to 8 points and improves fuel economy. | Diagnosis or repair may still be required. |
| Engine Wear | High-utilization diesel engines face significant friction. | DP530QT-EA | Delivers up to 6X more wear protection than leading industry standards. | Diagnosis or repair may still be required. |
Diesel maintenance notes for this vehicle
- Fuel System Integrity: For high-efficiency diesel variants, maintaining fuel system integrity and turbocharger health is critical.
- Duty Cycles: Because this is a commercial platform, maintenance schedules may be dictated by duty cycles rather than just mileage.
- Verification: Always verify specific oil grades and filter part numbers against the owner’s manual or via VIN-specific lookup to ensure compatibility with the 3.0L diesel engine and its turbocharger system.
Common maintenance concerns for this vehicle
Owners of the Ram ProMaster 3500 diesel should focus on high-utilization service items. Key areas include monitoring fuel system integrity, ensuring turbocharger health, and maintaining strict emissions compliance. Given its role as a commercial work vehicle, regular inspections of cooling system components (gaskets and hoses) and transmission fluid condition are recommended to prevent downtime.
About this vehicle
The 2018 Ram ProMaster 3500 is part of the Stellantis commercial vehicle lineup. It is important to distinguish this model from the Ram heavy-duty pickup series (such as the 2500 or 3500 trucks). The ProMaster line is a specialized commercial platform that shares its lineage with the Fiat Ducato, a light commercial vehicle developed through a joint venture involving FCA Italy and PSA Group.
This connection suggests that many mechanical components and service procedures may align with European-designed commercial standards rather than standard Ram heavy-duty pickup architecture. The 3.0L 4-cylinder diesel engine configuration is typical for high-efficiency, high-torque commercial applications where payload capacity and fuel economy are prioritized over the raw towing power found in larger Cummins-powered pickups.
Typical use cases for this 3500-series van include heavy-duty cargo transport, tradesperson service vehicles, and specialized delivery applications. Because it is a commercial chassis, maintenance requirements are often more rigorous than passenger vehicles. Owners should be careful to source parts specifically for the ProMaster commercial chassis rather than general Ram pickup parts.
Recall, TSB, and manufacturer communication notes
Official NHTSA recall research for the 2018 Ram ProMaster 3500 returned no recall records. Additionally, no consumer complaints were found in the NHTSA database for this specific year/make/model combination at this time. However, owners should always verify open recalls by VIN, as applicability can depend on production date, trim, and equipment.
Common questions about this vehicle’s diesel oil and maintenance
What is the oil capacity for my 2018 Ram ProMaster 3500 diesel?
The capacity is 9.5 quarts when performing an oil change with a filter. Always check the level after refilling.
What viscosity of oil should I use?
The AMSOIL lookup specifies 5W-30 for all temperatures for this engine.
How much transmission fluid does the automatic version take?
For the 6-speed 62TE automatic transmission, the total fill capacity is 9 quarts, while the initial fill is 5.5 quarts.
Can I use any antifreeze in my ProMaster?
The AMSOIL lookup lists options like ANTPC1G-EA (50/50 pre-mix) or ANT1G-EA (concentrated). Always check your manual for compatibility.
What torque spec is needed for the oil drain plug?
The oil drain plug should be torqued to 33 ft/lbs. Use a new washer and an OE drain plug.
How can I improve diesel fuel performance?
Additives like ADFPCN-EA or ACBCN-EA can help clean injectors and increase cetane levels.
Disclaimer: Not all information provided is confirmed from source data. Always verify fluid capacities, specifications, and torque values against your vehicle’s owner’s manual or a VIN-specific lookup before performing maintenance.