Can engine oil still be used if it has expired for two years?

[McWalker]

Engine oil that has expired for two years cannot be used. Engine oil is a highly hygroscopic substance: Over time, engine oil absorbs moisture from the air, leading to its deterioration. Expired oil may have undergone chemical changes, and using it can negatively impact the engine. Additionally, the degradation process of the oil can produce impurities, which, when introduced into the engine, can accelerate the formation of carbon deposits. Prolonged use can lead to serious consequences. Storage method for opened engine oil: After opening, seal it immediately. Once maintenance is completed at a 4S shop or repair facility, the oil bottle cap should be tightened promptly. The sealed oil bottle should be stored in a dry and cool place, away from sunlight, to prevent oxidation of the oil inside.