Should engine oil be changed annually?

[MaddoxAnn]

Engine oil does not need to be changed annually. Typically, it should be replaced every 5,000 kilometers or every six months, whichever comes first. For example, if a car has only been driven for three months but has already reached 5,000 kilometers, it's time for maintenance and an oil change. Conversely, if the mileage hasn't reached 5,000 kilometers within six months, the oil should still be changed because engine oil has a shelf life. Engine oil, also known as motor lubricant, is often referred to as the lifeblood of an engine. It serves multiple functions, including lubrication and wear reduction, auxiliary cooling, sealing and leak prevention, rust and corrosion protection, and shock absorption. Currently, there are three types of engine oil available on the market: conventional mineral oil, semi-synthetic oil, and full-synthetic oil.