For the 2018 Ram 1500 Pickup equipped with the 3.0L 6-cylinder (Engine Code M EXF M) Diesel Turbo engine, the required oil viscosity is 5W-40. The engine oil capacity is 10.6 quarts when performing a change with a new filter. AMSOIL recommends using Signature Series 5W-40 100% Synthetic Max-Duty Diesel Oil (DEOQT-EA) paired with a WIX Oil Filter (WL10060-EA) for optimal protection.
What oil does a 2018 Ram 1500 3.0L Diesel take?
The 2018 Ram 1500 with the 3.0L 6-cylinder diesel engine requires an oil viscosity of 5W-40 for all temperatures. The AMSOIL lookup identifies the oil grade as SEO39. Using a high-quality synthetic diesel oil is critical for protecting turbocharger and fuel injection components under varying thermal profiles.
AMSOIL product recommendations
The following AMSOIL products are recommended for your 2018 Ram 1500 3.0L Diesel engine to maintain performance and extend component life.
Engine Oil Options
| Product Name | Code |
|---|---|
| AMSOIL Signature Series 5W-40 100% Synthetic Max-Duty Diesel Oil | DEOQT-EA |
| AMSOIL 5W-40 Heavy-Duty 100% Synthetic Diesel Oil | ADOQT-EA |
Filter Recommendations
| Component | Product/Code |
|---|---|
| Oil Filter | WIX WL10060-EA |
| Air Filter | WIX 42725-EA |
Other Essential Fluids
| Component | Product/Code |
|---|---|
| Antifreeze/Coolant | ANTPC1G-EA / ANT1G-EA |
| Automatic Transmission Fluid | ATLPK-EA / OTLQT-EA |
Engine Oil Specifications
| Property | Value |
|---|---|
| Viscosity | 5W-40 (All TEMPS) |
| Oil Grade | SEO39 (AMSOIL lookup oil grade) |
How much oil does it take with a filter change?
The total capacity for the 3.0L diesel engine is 10.6 quarts when replacing the oil filter. It is important to check the oil level after refilling to ensure accuracy.
| Specification | Detail |
|---|---|
| Oil Capacity | 10.6 quarts (with filter) |
| Drain Plug Torque | 33 ft/lbs |
Diesel maintenance notes for this vehicle
Maintaining a turbo-diesel engine requires attention to specific systems. Owners should focus on monitoring Diesel Exhaust Fluid (DEF) levels where applicable and managing fuel filtration systems to prevent contamination. Because diesel engines operate under different thermal and pressure profiles than gasoline counterparts, adhering to strict oil viscosity standards is vital for long-term reliability.
Common diesel oil-related concerns and how AMSOIL products may help
Diesel engines face unique stresses that can impact lubrication performance. The following table outlines common concerns and how specific AMSOIL products are designed to address them.
| Concern | Why it matters | AMSOIL Product | How it may help | Limitation |
|---|---|---|---|---|
| Engine Wear | High pressure in diesel cylinders causes friction. | DEOQT-EA | Delivers up to 6X more wear protection. | Requires regular oil changes. |
| Extreme Temperatures | Viscosity changes can affect lubrication. | ADOQT-EA | Excels in extreme temperatures. | Not a substitute for proper cooling. |
| Heavy Towing/Use | Increased heat and stress on transmission. | ATLPK-EA | Withstands rigors of heavy towing and elevated temperatures. | Diagnosis required for mechanical failure. |
Common maintenance concerns for this vehicle
Based on owner reports and technical data, owners should be aware of the following:
- Steering System: NHTSA complaint data indicates reports regarding electric power steering stiffness or failure.
- Engine Synchronization: A recall (Campaign 20V475000) was issued for certain 3.0L diesel engines where the crankshaft position sensor tone wheel may delaminate, potentially causing engine stalls.
- Tailgate Security: Some models were subject to a recall regarding the tailgate actuator limiter tab fracturing.
Note: These are reported concerns or official recalls; always verify your specific vehicle’s status via VIN.
Recall, TSB, and manufacturer communication notes
NHTSA recall research for the 2018 Ram 1500 indicates at least 15 recall records. One significant recall (Campaign 20V475000) involves the crankshaft position sensor tone wheel in 3.0L diesel engines, which may cause an engine stall. Owners should contact FCA US customer service or a dealer to check if their vehicle is affected and to receive free software updates for the powertrain control module.
Important: Always verify open recalls by using your specific Vehicle Identification Number (VIN) at the NHTSA website or through an authorized Ram dealer.
About this vehicle
The 2018 Ram 1500 Pickup is a full-size light-duty truck manufactured by Ram Trucks, a division of Stellantis North America. This specific model features the 3.0L 6-cylinder diesel engine (Code M EXF M), which is often utilized for its improved fuel efficiency and towing capabilities compared to standard gasoline variants.
The fifth-generation Ram platform was introduced around this era, representing a significant evolution in the light-duty line. While distinct from heavy-duty models like the Ram 2500 or 3500, this diesel variant is popular among owners who balance daily driving utility with demanding towing tasks. Because of the technical nature of the 3.0L diesel engine, maintenance should focus on high-quality lubrication and filtration to protect the turbocharger and fuel injection systems.
Owners should note that due to model year overlaps in production, it is always recommended to verify exact engine specifications via the VIN to ensure all replacement parts and fluids are compatible with their specific build.
Common questions about this vehicle’s diesel oil and maintenance
What is the correct oil viscosity for my 2018 Ram 3.0L Diesel?
The AMSOIL lookup specifies a viscosity of 5W-40 (All TEMPS) for this engine.
How much oil does the 3.0L diesel engine hold?
The capacity is 10.6 quarts, which includes the volume required for a new oil filter.
What torque spec should I use for the oil drain plug?
The confirmed torque specification for the oil drain plug is 33 ft/lbs.
Can I use any diesel oil in my Ram 1500?
It is recommended to use oils designed for diesel applications, such as AMSOIL Signature Series 5W-40 (DEOQT-EA), to ensure proper protection of diesel-specific components.
What should I do if there is a recall on my 3.0L diesel engine?
If your vehicle is part of the crankshaft position sensor tone wheel recall, contact an authorized dealer. They can update the powertrain control module software free of charge.
How often should I change my transmission fluid?
While specific intervals depend on usage, AMSOIL provides high-performance options like ATLPK-EA to help manage the heat and stress of heavy towing.
Disclaimer: This information is derived from provided source data. Always consult your owner’s manual or a certified mechanic to confirm specifications and service requirements for your specific vehicle.