2019 Ram 2500 6.7 oil capacity and type are critical details for any owner looking to maintain the longevity and peak performance of their heavy-duty truck. The 6.7-liter Cummins Turbo Diesel engine is renowned for its power and durability, but like any sophisticated machinery, it relies heavily on proper lubrication. Understanding the correct oil specifications, capacity, and change intervals is not just about keeping your truck running; it’s about protecting a significant investment and ensuring it performs reliably for years to come, whether you’re hauling heavy loads across state lines or navigating challenging job sites.
Why Proper Oil Maintenance Matters for Your Diesel Engine
For a robust engine like the 6.7L Cummins, engine oil does far more than just lubricate moving parts. It also acts as a coolant, carrying heat away from critical components; a cleaner, suspending contaminants and preventing sludge buildup; and a protector, forming a film that prevents metal-on-metal contact and corrosion. Neglecting oil changes or using the wrong type of oil can lead to a cascade of problems, including reduced engine efficiency, increased wear, potential warranty invalidation, and ultimately, costly repairs. Modern diesel engines, especially those equipped with complex exhaust aftertreatment systems like the Diesel Particulate Filter (DPF) and Selective Catalytic Reduction (SCR), are particularly sensitive to oil quality and type.
Understanding the 2019 Ram 2500 6.7 Oil Capacity
One of the most common questions revolves around how much oil your truck needs. For the 2019 Ram 2500 equipped with the 6.7L Cummins Turbo Diesel engine, the oil capacity is approximately 12 US quarts (11.3 liters). This generous capacity is necessary to adequately lubricate and cool such a large, powerful engine, especially under the strenuous conditions these trucks are often subjected to.
It’s crucial to always verify the oil level using the dipstick after adding oil. While 12 quarts is the standard capacity when performing a complete oil and filter change, slight variations can occur depending on how thoroughly the old oil was drained. Always add most of the recommended amount, then start the engine, let it run for a minute or two, shut it off, wait a few minutes for the oil to settle, and then check the dipstick. Top off as needed, ensuring the level falls within the safe operating range indicated on the dipstick, typically between the “MIN” and “MAX” marks. Overfilling can lead to aeration of the oil, reducing its effectiveness and potentially causing seal damage, while underfilling starves the engine of vital lubrication.
Recommended Oil Type for Your 2019 Ram 2500 6.7
Selecting the correct oil type is arguably even more critical than getting the capacity right. The 2019 Ram 2500 6.7L Cummins engine requires a specific type of heavy-duty diesel engine oil to meet its operational demands and protect its advanced emissions systems.
The primary specification to look for is API CK-4. This designation indicates that the oil is formulated for high-speed, four-stroke diesel engines designed to meet 2017 model year on-highway and Tier 4 non-road exhaust emission standards. CK-4 oils are specifically engineered to provide enhanced protection against oxidation, shear stability, aeration, and soot handling, while also being compatible with the latest exhaust aftertreatment systems. Using an oil that does not meet the CK-4 standard can lead to premature wear, DPF clogging, and reduced engine life.
In terms of viscosity, the recommended grade for the 2019 Ram 2500 6.7L Cummins is SAE 5W-40 synthetic diesel engine oil. While some older Cummins engines or specific operating conditions might recommend 15W-40, the 5W-40 synthetic offers superior performance across a broader range of temperatures, which is particularly beneficial for cold starts in colder climates found across much of the US and Canada. The “W” stands for “winter,” indicating its cold-weather performance, and the “40” refers to its viscosity at operating temperature. Synthetic oils generally offer better flow at low temperatures, greater thermal stability at high temperatures, and extended drain intervals compared to conventional oils, making them an excellent choice for a hard-working diesel.
Always refer to your truck’s owner’s manual for the most definitive and up-to-date recommendations, as specifications can sometimes be revised. Reputable brands that meet these specifications include Mopar MaxPro (the OEM choice), Shell Rotella T6, Mobil Delvac 1, and Valvoline Premium Blue.
Understanding Oil Specifications (API CK-4, 5W-40)
API CK-4: This is a performance standard set by the American Petroleum Institute. It signifies that the oil has passed a series of stringent tests designed to ensure it can withstand the harsh conditions inside modern diesel engines, especially those with exhaust aftertreatment devices like Diesel Particulate Filters (DPF) and Selective Catalytic Reduction (SCR) systems. CK-4 oils are low-ash formulations, which helps prevent DPF clogging and extends the life of these expensive components.
SAE 5W-40: This is the viscosity grade, determined by the Society of Automotive Engineers.
The “5W” indicates the oil’s viscosity at cold temperatures (“W” for winter). A lower number here means the oil is thinner in cold weather, allowing for easier cold starts and faster lubrication of engine components during startup, which is when most engine wear occurs.
The “40” indicates the oil’s viscosity at operating temperature. A higher number means the oil maintains a thicker film at hot temperatures, providing robust protection when the engine is working hard.
Synthetic 5W-40 oils are particularly beneficial for their wide temperature range performance and stability.
Oil Change Intervals for the 2019 Ram 2500 6.7
While capacity and type are crucial, adherence to recommended oil change intervals is equally important. For the 2019 Ram 2500 6.7L Cummins, the manufacturer typically recommends oil and filter changes at intervals of 15,000 miles (24,000 km), 12 months, or 250 engine hours, whichever comes first.
However, these intervals can be significantly shortened under what Chrysler/Ram refers to as “severe duty” conditions. These conditions include:
Frequent towing or hauling heavy loads.
Operating in extremely hot, cold, or dusty environments.
Extended periods of idling.
* Frequent short trips where the engine doesn’t reach full operating temperature.
If your driving habits fall into the severe duty category, it’s wise to consider changing your oil and filter closer to every 7,500 miles (12,000 km) or 6 months. Many Ram trucks are also equipped with an Oil Life Monitor (OLM) system, which calculates the remaining oil life based on driving conditions. While a useful guide, it’s generally recommended not to exceed the manufacturer’s maximum recommended mileage or time intervals, regardless of what the OLM indicates, especially if you fall under severe duty.
Performing an Oil Change
While professional service is always an option, many truck owners prefer to perform their own maintenance. Changing the oil on a 2019 Ram 2500 6.7L involves:
1. Gathering Supplies: 12 quarts of API CK-4 SAE 5W-40 synthetic diesel oil, a new high-quality oil filter (e.g., Mopar, Cummins Fleetguard), a large oil drain pan (at least 15-quart capacity), an oil filter wrench, a socket wrench for the drain plug, and possibly a funnel.
2. Safety First: Ensure the truck is on a level surface, engine is warm but not scalding hot, and securely supported with jack stands if you’re raising it.
3. Drain Oil: Locate the drain plug on the oil pan, place the drain pan underneath, and carefully remove the plug. Allow ample time for the oil to drain completely.
4. Replace Filter: Locate the oil filter, remove it with an oil filter wrench (be prepared for some oil to spill), and replace it with a new one. Before installing the new filter, apply a thin film of fresh oil to the rubber gasket.
5. Refill Oil: Reinstall the drain plug securely. Using a funnel, slowly add the new oil, starting with around 11 quarts.
6. Check Level: Start the engine, let it run for a minute or two, then shut it off. Wait several minutes for the oil to settle, then check the dipstick and top off as necessary to reach the “MAX” mark.
7. Dispose: Properly dispose of the used oil and filter at an authorized recycling center.
Conclusion
Maintaining the optimal performance and longevity of your 2019 Ram 2500 6.7L Cummins Turbo Diesel hinges significantly on adhering to the correct oil capacity, type, and change intervals. By consistently using 12 US quarts of API CK-4 SAE 5W-40 synthetic diesel engine oil and following the manufacturer’s recommended service schedule, you’re investing in the reliability and sustained power that your heavy-duty truck was designed to deliver. Regular, diligent oil maintenance is the cornerstone of keeping your Cummins engine running strong for hundreds of thousands of miles.
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Source:
Ram 2500 Owner’s Manual (2019 Model Year) and manufacturer specifications for 6.7L Cummins Turbo Diesel engines.