What Causes the Scraping Sound When the Car is Running?

1 Answers
MacJeffrey
07/29/25 1:08pm
There are many possible reasons for noise during car driving: it may be due to engine oil issues. Inferior quality engine oil, prolonged lack of oil changes, or insufficient oil levels can all easily increase friction between the valves and guides, as well as in hydraulic lifters, thereby amplifying various sounds within the engine. Relevant information about engine oil is as follows: Introduction: Engine oil, also known as engine lubricant, English name: Engine-oil. With a density of approximately 0.91×10³ (kg/m³), it serves to lubricate and reduce wear in the engine, assist in cooling, seal against leaks, prevent rust and corrosion, and provide shock absorption. It is hailed as the 'blood' of the car. Composition: Engine oil consists of two parts: base oil and additives. The base oil is the main component of lubricating oil, determining its basic properties, while additives can compensate for and improve the shortcomings of the base oil, imparting certain new properties, making them an important part of lubricating oil.
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