Which engine oil is best for reducing engine noise?

[AuroraLee]

For quieter engine operation, fully synthetic oil is recommended. The reasons for using fully synthetic oil are: 1. Synthetic oil has a wider temperature range compared to semi-synthetic and mineral oils; 2. Synthetic oil is less prone to deterioration, has lower evaporation loss, and lasts longer than conventional oil; 3. It offers excellent chemical stability, good radiation resistance, high oil film strength with minimal foaming, providing superior lubrication and reduced wear; 4. Fully synthetic oil has less thermal degradation, saves fuel, and provides better engine protection. The method for changing engine oil is: 1. Lift the vehicle with a jack, locate and loosen the drain plug to drain the oil; 2. After removing the oil filter, place a container underneath; 3. Install a new oil filter and add fresh oil.