Maintaining the 2018 Ram 2500 is essential for preserving its legendary capability and ensuring years of dependable service. This full-size pickup was engineered to handle serious workloads, and a consistent oil change schedule is the single most effective way to protect that capability. Understanding the specifics for your model year helps to keep the 6.7-liter Cummins diesel running with the power and efficiency it is known for.
Recommended Oil Specifications
Following the factory specifications is critical for the longevity of the engine. For the 2018 Ram 2500 equipped with the 6.7-liter Cummins diesel, the recommended oil is generally a high-quality 15W-40 viscosity. This specific weight provides the necessary protection for the high-compression diesel engine, ensuring proper lubrication during cold starts and maintaining a stable film at operating temperatures. Always verify the exact rating on the oil filler cap or in the owner’s manual, as variations can occur based on specific trim and configuration.
Oil Capacity and Filter
Knowing the exact volume of oil required for a complete change prevents under-filling, which can lead to poor lubrication, and over-filling, which can cause pressure issues. The 2018 Ram 2500 typically requires between 15 to 16 quarts of oil for a diesel engine filter change. Speaking of the filter, selecting the correct replacement is just as important as choosing the right oil. A high-efficiency filtration system is vital for diesel engines, as they operate with higher soot levels; therefore, a premium filter designed specifically for a Cummins powerplant is the best defense against premature wear.
Step-by-Step Change Procedure
Performing the oil change correctly ensures that the new fluid performs at its peak. The procedure involves several critical steps that should be followed methodically. First, the vehicle must be warmed up to operating temperature, which allows the old oil to flow freely and suspend contaminants, making for a more complete drainage. After lifting the truck safely and securing it on jack stands, the drain plug is removed, and the old filter is carefully taken off. Before installing the new filter, a small amount of fresh oil is applied to the gasket to ensure a proper seal without over-tightening.
Torque Specifications
Reassembly requires precision, particularly when it comes to the drain plug and oil filter. Applying the correct torque is not just a recommendation; it is a safety requirement. The drain plug on the 2018 Ram 2500 should typically be tightened to approximately 13-15 ft-lbs, while the oil filter usually requires a snug hand-tight plus a quarter turn. Over-tightening these components can strip the threads or damage the oil pan, leading to costly repairs down the line. Using a torque wrench is the only way to guarantee these specifications are met accurately.
Best Oil Types for the 6.7L Cummins
Not all oils are created equal, and the 6.7-liter Cummins engine benefits from modern synthetic formulations. While conventional oil is available, synthetic blends or full synthetics are superior for managing the heat and stress generated by a diesel workhorse. Look for products that meet or exceed CJ-4 rating, which is the industry standard for heavy-duty diesel protection. Brands that offer robust additive packages will help to keep the engine clean, resist viscosity breakdown, and maximize fuel economy over the life of the vehicle.
