If you drive a Dodge Ram 2500 with a 6.7L Cummins diesel engine, you know it’s built for power, towing, and endurance. But every powerhouse needs proper care to keep running smoothly. One of the most common questions diesel truck owners ask is: How much does it cost to change the oil on a Ram 2500 diesel? The total cost depends on several factors — the type of oil you use, your...