How often should oil be changed on a big rig?

Oil changes for big rigs typically depend on factors like the type of oil used, the engine's make and model, and the operating conditions. Generally, it's recommended to change the oil every 10,000 to 15,000 miles for synthetic oil and more frequently for conventional oil. Additionally, regular monitoring of oil condition and engine performance can help determine the optimal change interval. Always consult the manufacturer's guidelines for specific recommendations.