How to Determine if the Engine Oil Needs to be Changed?

[VanColeman]

Methods to determine if the engine oil needs to be changed: Observe its transparency and color: If the color is clear without impurities or strange odors, it can still be used. If the color turns black and has a strange odor, it's time to change the oil, as the oil has deteriorated and can no longer provide protection. Engine oil, also known as engine lubricant, serves to lubricate and reduce friction, assist in cooling, seal against leaks, prevent rust and corrosion, and act as a shock absorber for the engine. It is often referred to as the 'blood' of the car. Engine oil consists of two parts: base oil and additives. The base oil is the main component of the lubricant, determining its basic properties, while the additives compensate for and improve any deficiencies in the base oil's performance.