For the 2018 Ram 2500 Pickup with the 6.7L 6-Cylinder Diesel engine (Engine Code L), the oil capacity is 12 quarts with a filter change. The recommended viscosity is 15W-40 for ambient temperatures above -18°C, or 5W-40 synthetic oil for temperatures below -18°C to prevent severe engine damage. AMSOIL recommends using the Signature Series 5W-40 Max-Duty Diesel Oil paired with an AMSOIL or WIX oil filter.
What oil does a 2018 Ram 2500 6.7L Diesel take?
The 2018 Ram 2500 with the 6.7L diesel engine requires an API CJ/CK-4 grade oil that meets MS-10902 specifications. For temperatures above -18°C (0°F), a 15W-40 viscosity is appropriate. However, if you operate in ambient temperatures below -18°C, you must use SAE 5W-40 synthetic engine oil to avoid severe engine damage.
AMSOIL product recommendations
Based on the vehicle lookup for the 2018 Ram 2500 6.7L Diesel, the following high-performance fluids and filters are recommended to maintain engine health and meet required specifications.
Engine Oil Options
| Product Name | Viscosity | Code |
|---|---|---|
| Signature Series 5W-40 Max-Duty Diesel Oil | 5W-40 / 15W-40 | DEOQT-EA |
| 5W-40 Heavy-Duty 100% Synthetic Diesel Oil | 5W-40 / 15W-40 | ADOQT-EA |
Oil Specification Note: The AMSOIL lookup note requires API CJ/CK-4 oil meeting MS-10902. Oil meeting Cummins CES 20081 standards may also be used. Low ash diesel engine oil is required.
Oil Filter Options
| Product Name | Code |
|---|---|
| AMSOIL Oil Filter | EAO80-EA |
| WIX XP Oil Filter | 57620XP-EA |
| WIX Oil Filter | 57620-EA |
Coolant & Air Filtration
| Component | Product Name | Code |
|---|---|---|
| Coolant | Passenger Car & Light Truck Antifreeze | ANTPC1G-EA |
| Coolant | Propylene Glycol Antifreeze | ANT1G-EA |
| Air Filter | WIX Air Filter | 46930-EA |
Engine Oil Specifications
| Parameter | Specification/Value |
|---|---|
| Oil Grade (AMSOIL lookup) | SEO39 |
| Viscosity (Above -18°C) | 15W-40 |
| Viscosity (Below -18°C) | 5W-40 (Synthetic Required) |
| API Specification | CJ/CK-4 |
| OEM Standards | MS-10902 or Cummins CES 20081 |
How much oil does it take with a filter change?
The total capacity for the 6.7L diesel engine is 12 quarts when performing an oil change with a new filter installed. It is critical to follow proper filling procedures to ensure accurate levels.
Oil Change Capacity & Torque
| Detail | Specification |
|---|---|
| Capacity (with filter) | 12 quarts |
| Oil Drain Plug Torque | 37 ft/lbs |
Maintenance Tip: After filling, start the engine and let it idle for several minutes. Check for leaks, then stop the engine. Wait 30 minutes to allow the oil to drain back into the pan before checking the level again.
Diesel maintenance notes for this vehicle
- Low Ash Requirement: A low ash diesel engine oil is required for this application.
- Cold Weather Warning: Failure to use SAE 5W-40 synthetic engine oil in ambient temperatures below 0 F (-18 C) could result in severe engine damage.
- Filter Efficiency: Using high-quality filters like the AMSOIL Oil Filter can provide 99 percent filtering efficiency at 20 microns and help reduce engine wear.
Common diesel oil-related concerns and how AMSOIL products may help
Diesel engines operate under high stress, making specialized lubrication essential for longevity.
| Concern | Why it matters | AMSOIL Product | How it may help | Limitation |
|---|---|---|---|---|
| Extreme Temperatures | Affects viscosity and flow. | Signature Series 5W-40 | Excels in extreme temperatures. | Must match ambient temp requirements. |
| Engine Wear | High pressure causes friction. | DEOQT-EA | Delivers 6X more wear protection. | Requires regular oil changes. |
| Fuel Efficiency | Operational costs. | ADOQT-EA | Maximizes fuel efficiency. | Not a replacement for driving habits. |
Common maintenance concerns for this vehicle
Based on owner reports and general diesel operation, owners should monitor the following:
- Brake System Performance: There have been numerous consumer complaints regarding service brakes and hydraulic brake control units.
- Electrical/Sensor Issues: Monitoring dashboard warning lights related to ABS or Traction Control is advised if intermittent issues occur.
- Filtration Integrity: Maintaining clean air and oil filters is vital for protecting turbochargers and fuel injectors in high-stress environments.
Recall, TSB, and manufacturer communication notes
NHTSA research indicates several recalls and complaints for the 2018 Ram 2500:
- Steering Linkages: A recall (Campaign 18E096000) was noted regarding aftermarket suspension kits that could weaken the joint between the steering drag link and knuckle.
- Tailgate Latch: A recall (Campaign 19V347000) involves the tailgate actuator limiter tab which may fracture, causing the tailgate to unlatch while driving.
- Backup Camera: A recall (Campaign 18V398000) was identified where the backup camera may experience a loss of image display.
Note: Always verify open recalls by checking your specific VIN through official manufacturer or NHTSA channels.
About this vehicle
The 2018 Ram 2500 is a heavy-duty pickup truck manufactured by the Ram Trucks division of Stellantis (formerly part of FCA US LLC). As part of the Ram Heavy Duty lineup, the 2500 model is positioned as a high-capacity workhorse, designed for demanding tasks such as heavy towing and hauling. This makes it a staple in both commercial and enthusiast segments.
This specific configuration features a 6.7L diesel engine from the Cummins engine family. Cummins Inc. is well-known for designing and manufacturing high-performance diesel engines that provide the torque and durability required for serious work applications. Because this vehicle utilizes a specialized diesel powertrain, maintenance requirements differ significantly from standard gasoline-powered light-duty trucks.
Owners of this vehicle typically focus on maintaining engine longevity through rigorous service schedules. Common research topics for this model include fuel system integrity, air filtration, and the management of emission control systems. Given the heavy-duty nature of the 2500 series, monitoring fluid health is critical to preventing premature wear in high-stress environments. Note that specific performance metrics like exact horsepower or torque should be verified against the owner’s manual or VIN.
Common questions about this vehicle’s diesel oil and maintenance
What is the correct oil viscosity for my 2018 Ram 2500 6.7L?
The AMSOIL lookup recommends 15W-40 for temperatures above -18°C. If you operate in environments below -18°C (0°F), you must use SAE 5W-40 synthetic engine oil to prevent damage.
How often should I change the oil on my Cummins diesel?
While specific intervals depend on usage, AMSOIL products like Signature Series 5W-40 are designed to help confidently extend drain intervals.
Can I use standard diesel oil in my Ram 2500?
No, you must use an oil that meets API CJ/CK-4 standards and MS-10902 specifications. Additionally, a low ash diesel engine oil is required for this engine.
What should I do if my dashboard traction control light flashes?
This can be related to the Hydraulic Brake Control Unit (HCU). While owner complaints suggest intermittent issues, you should have your vehicle inspected by a professional. Some NHTSA complaints mention concerns regarding ABS/ESC performance.
Does the 2018 Ram 2500 have any active recalls?
NHTSA records show recalls for steering linkages (aftermarket kits), tailgate latches, and backup cameras. You should verify your specific VIN with a dealer to confirm which recalls apply to your truck.
What is the oil capacity for a filter change?
The 6.7L engine requires 12 quarts of oil when replacing the filter during an oil change service.
Disclaimer: This information is derived from provided source data. Always consult your manufacturer’s official service manual and verify specific requirements against your vehicle’s VIN before performing maintenance.