Does a car need an oil change if it hasn't been driven for half a year?

[CarmenRose]

The oil change cycle is half a year or 5,000 kilometers driven. As long as the oil change cycle requirement is met, even if the car hasn't been driven for half a year, the oil still needs to be changed. The main functions of engine oil are to clean, cool, and lubricate the engine, ensuring reduced wear on internal components during operation. It also serves to seal against leaks and prevent rust and corrosion. Under normal circumstances, oil consumption is minimal. The primary reason for changing oil is that esters and polyolefins in the oil undergo oxidation, and wear particles from engine components enter the oil, shortening its lifespan and causing internal components to deteriorate. Engine oils on the market are divided into three types: mineral oil, semi-synthetic oil, and fully synthetic oil. Conventional mineral oil should be changed every six months or 5,000 kilometers; semi-synthetic oil has a replacement cycle of about eight months or 7,500 kilometers; while fully synthetic oil should be changed annually or every 10,000 kilometers.