For the 2008 Dodge Ram 2500 HD with the 6.7L 6-cylinder diesel engine, the required oil capacity is 12 quarts (including filter). The preferred viscosity for temperatures above -18°C is SAE 15W-40, though 5W-40 synthetic oil is recommended for all temperatures to prevent severe engine damage in ambient temperatures below 0°F (-18°C). AMSOIL recommends using Signature Series 5W-40 100% Synthetic Max-Duty Diesel Oil or Heavy-Duty 100% Synthetic Diesel Oil.
AMSOIL product recommendations
Based on the vehicle lookup for the 6.7L 6-cylinder Engine Code [A] A Diesel Turbo, the following products are recommended to maintain peak performance and engine longevity.
Engine Oil Recommendations
| Product Name | Viscosity | Code |
|---|---|---|
| AMSOIL Signature Series 5W-40 100% Synthetic Max-Duty Diesel Oil | 5W-40 | DEOQT-EA |
| AMSOIL 5W-40 Heavy-Duty 100% Synthetic Diesel Oil | 5W-40 | ADOQT-EA |
Oil Specifications: The AMSOIL lookup note specifies use of API CJ/CK-4 oil meeting MS-10902 standards. Oil meeting Cummins CES 20081 standards may also be used. Low ash diesel engine oil is required.
Oil Filter Recommendations
| Product Name | Code |
|---|---|
| AMSOIL Oil Filter | EAO80-EA |
| WIX XP Oil Filter | 57620XP-EA |
| WIX Oil Filter | 57620-EA |
Air Filter Recommendations
| Product Name | Code |
|---|---|
| WIX Air Filter | 46930-EA |
| Donaldson P-Series Heavy Duty Air Filters | P616743-EA |
Coolant Recommendation
| Product Name | Code |
|---|---|
| AMSOIL Passenger Car & Light Truck Antifreeze & Coolant | ANTPC1G-EA |
Quick Summary: What oil does a 2008 Dodge Ram 2500 HD 6.7L take?
Engine Oil Specifications & Details
Proper lubrication is vital for the 6.7L Cummins diesel engine to manage high cylinder pressures and heat.
What oil viscosity should I use?
The choice of viscosity depends heavily on your ambient operating temperatures.
| Condition | Recommended Viscosity |
|---|---|
| Above -18°C | SAE 15W-40 (Preferred) |
| All Temperatures | SAE 5W-40 Synthetic |
Warning: Failure to use SAE 5W-40 synthetic engine oil in ambient temperatures below 0°F (-18°C) could result in severe engine damage.
How much oil does it take with a filter change?
The total capacity for this engine is 12 quarts when replacing the filter. To ensure accuracy during an oil change, follow these steps:
- Run the engine to operating temperature.
- Stop the engine and wait approximately 30 minutes to allow oil in the upper engine parts to drain back into the pan.
- Check the oil level and top off as needed.
Oil Drain Plug Torque
The torque specification for the oil drain plug is 37 ft/lbs.
Diesel maintenance notes for this vehicle
Maintaining a heavy-duty diesel requires attention to filtration and fluid integrity. For the 2008 Ram 2500, owners should focus on:
- Low Ash Requirement: The AMSOIL lookup note specifies that low ash diesel engine oil is required for this application.
- Filtration: Using high-efficiency filters like the EAO80-EA can help provide 99 percent filtering efficiency at 20 microns.
- Temperature Management: Ensure the correct synthetic viscosity is used if operating in sub-zero environments to prevent engine damage.
Common diesel oil-related concerns and how AMSOIL products may help
| Concern | Why it matters | AMSOIL Product | How it may help | Limitation |
|---|---|---|---|---|
| Cold Starts | Thick oil can prevent lubrication during startup. | DEOQT-EA | Excels in extreme temperatures. | Must use 5W-40 for temps below 0°F. |
| Engine Wear | Diesel engines face high pressure/heat. | Signature Series | Delivers 6X more wear protection. | Requires proper service intervals. |
| Contaminants | Soot and small particles cause abrasion. | EAO80-EA | 99% efficiency at 20 microns. | Filter must be replaced regularly. |
Recall, TSB, and manufacturer communication notes
NHTSA recall research for the 2008 Dodge Ram 2500 HD Pickup indicates 9 recall records were returned. One significant campaign (16V352000) involves Frontal Passenger Side Air Bag Inflator Modules that may rupture due to propellant degradation from long-term exposure to humidity and temperature.
Note: Always verify your specific vehicle’s status by checking the open recalls using your unique VIN through official manufacturer or NHTSA channels.
About this vehicle
The 2008 Dodge Ram 2500 HD represents a significant era in heavy-duty pickup history. During this period, the Ram brand was still marketed under the Dodge nameplate before becoming a standalone brand in 2010. As part of the Heavy Duty (HD) lineup, the 2500 series is engineered for high-capacity towing and heavy payloads, offering greater capability than the light-duty Ram 1500.
This specific model is equipped with the 6.7L Cummins diesel engine, a powerplant manufactured by Cummins Inc. The 6.7L Cummins engine is a cornerstone of the Ram Heavy Duty identity, providing the necessary torque for demanding commercial and recreational work applications. Because these vehicles are often used in high-stress environments—such as heavy towing or hauling—maintenance rigor is critical to ensuring longevity.
Owners of this generation typically focus on diesel-specific maintenance protocols, including fuel system integrity, turbocharger health, and robust filtration systems. Given the complexity of modern diesel emissions and fuel delivery, regular monitoring of engine performance and fluid quality is a primary concern for long-term reliability. Technical details regarding specific horsepower or exact torque ratings should be verified through an official service manual or VIN-specific lookup.
Common questions about this vehicle’s diesel oil and maintenance
What is the oil capacity for my 6.7L Cummins?
The capacity is 12 quarts when including a new filter. It is recommended to let the engine sit for 30 minutes after running it to operating temperature before checking levels to ensure all oil has drained back into the pan.
Can I use 15W-40 in my Ram 2500?
Yes, SAE 15W-40 is preferred for temperatures above -18°C. However, if you operate in ambient temperatures below 0°F (-18°C), the AMSOIL lookup recommends using SAE 5W-40 synthetic engine oil to avoid severe engine damage.
What oil specification does my diesel require?
The vehicle requires API CJ/CK-4 oil that meets MS-10902 standards. Additionally, oil meeting Cummins CES 20081 standards may be used, and a low ash diesel engine oil is required.
How often should I change my oil filters?
While service intervals vary by use, using premium filters like the WIX XP can offer drain intervals up to 25,000 miles. Always follow your specific heavy-duty service requirements.
Does my truck have any active recalls?
NHTSA data shows recalls related to air bag inflator modules for this model year. You should contact a dealer or visit the NHTSA website with your VIN to confirm if your specific truck has an open recall.
What are common complaints for the 2008 Ram 2500?
NHTSA complaint data shows various owner reports, with steering and air bags being among the most frequently mentioned components. Note that these are owner reports and not verified manufacturer defects.
Disclaimer: This information is derived from provided source data. Always consult your official vehicle owner’s manual or a certified mechanic before performing maintenance.