At what color should engine oil be changed?
1 Answers
Engine oil should be changed when it turns black. New engine oil is light yellow and transparent. After being added to the engine, due to prolonged use, some carbon deposits inside will cause the oil to gradually darken. Over time, it will turn completely black. Oil changes are based on maintenance intervals and mileage, whichever comes first—typically every six months or 5,000 kilometers. Most newer models require oil changes every six months, 7,500 kilometers, or 10,000 kilometers. Engine oil, also known as motor lubricant, serves functions such as lubrication, cooling, sealing, rust prevention, and shock absorption. It consists of base oil and additives.