Ram Truck Chassis Cab (3500, 4500, and 5500 Models)
WARNING: This page is about a different car, the 2011 RAM Pickup and 2011 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
Replace the engine oil and oil filter every 7,500 miles (12 000 km) or six months, or sooner if prompted by the oil change indicator system (if equipped). Under no circumstances should oil change intervals exceed 7,500 miles (12 000 km) or six months, whichever comes first.