What happens if you don't change the engine oil for too long?

1 Answers
RileyAnn
07/29/25 5:29pm
Not changing the engine oil for too long will significantly reduce its sealing, lubrication, and cooling effects, causing the oil viscosity to decrease, severe water-like thinning, and containing a large amount of metal debris and sludge. The impurities in the oil will wear down internal components, thereby affecting the engine's lifespan and making the engine more prone to malfunctions, leading to safety hazards. Once the oil deteriorates and its performance declines, the lubrication properties for bearings and the lubrication and cooling functions for mechanical transmission parts will be lost, affecting the vehicle's operation and further damaging the engine. Engine oil, also known as engine lubricant, serves to lubricate and reduce friction, assist in cooling, seal against leaks, prevent rust and corrosion, and provide shock absorption for the engine.
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