
Engine oil needs to be changed for the following reasons: 1. Engine oil has a shelf life, and over time its performance degrades, accelerating wear on mechanical components; 2. After prolonged exposure to high temperatures within the engine, the physical and chemical properties of the oil change, affecting its mechanical performance; 3. With extended engine operation, impurities in the oil increase, which can speed up wear on mechanical parts. Failing to change the oil for too long can significantly reduce its sealing, lubricating, and cooling functions, leading to decreased oil viscosity, severe thinning, and the accumulation of metal debris and sludge. The impurities in the oil can wear down internal components, shortening the engine's lifespan and potentially causing engine malfunctions, posing safety risks.


