Does Engine Oil Expire?

[ElijahAnn]

Engine oil does expire. Engine oil is made by adding various chemical additives to base oil, and these chemical additives have a shelf life. Therefore, choosing the right oil quality and adhering to the recommended oil change intervals are crucial. Expired engine oil should not be used in principle. Engine oil is highly hygroscopic, meaning it absorbs moisture from the air over time, leading to oil degradation. Expired oil may have undergone chemical changes, and using it can negatively affect the engine. Additionally, as the oil deteriorates, it can produce impurities that, when introduced into the engine, accelerate carbon deposit formation. Prolonged use of expired oil can have serious consequences. Furthermore, over time, the components of the oil itself undergo physical and chemical changes, resulting in reduced performance.