Why Does the Engine Noise Decrease After an Oil Change?

1 Answers
SanSamuel
07/25/25 12:16am
It may be due to the appropriate viscosity of the new oil, which results in reduced engine noise during operation. The functions of engine oil: Engine oil, or engine lubricant, with a density of approximately 0.91×10 (kg/m³), serves to lubricate and reduce friction, assist in cooling, seal against leaks, prevent rust and corrosion, and provide shock absorption for the engine. Composition of engine oil: Engine oil consists of base oil and additives. The base oil is the primary component of the lubricant, determining its fundamental properties, while additives compensate for and enhance the performance of the base oil, imparting new characteristics. Additives are an essential part of the lubricant.
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