How often should engine oil be changed for cars that are rarely driven?

[JaxsonFitz]

For cars that are rarely driven, the engine oil should be changed every six months. The oil change interval for each car owner depends on the limits of the oil and oil filter. Choosing an oil filter that matches the oil is an important factor in extending the oil change interval. It is normal for engine oil to turn black, as the oil itself has strong cleaning capabilities. Through circulation, the oil can wash away and dissolve contaminants such as carbon deposits, sludge, and metal particles from engine components. Engine oil, also known as engine lubricant, serves to lubricate and reduce friction, assist in cooling, seal against leaks, prevent rust and corrosion, and provide cushioning and shock absorption for the engine. Engine oil consists of two parts: base oil and additives. The base oil is the main component of lubricating oil, determining its basic properties, while additives compensate for and improve the shortcomings of the base oil, imparting certain new properties and making them an important part of lubricating oil.