The oil cooler is a device that accelerates the heat dissipation of lubricating oil to keep it at a lower temperature. The purpose of installing this device is to prevent the lubrication effect from weakening due to the increase in oil temperature. According to the different cooling media, oil coolers can be divided into air-cooled and water-cooled types. The air-cooled type uses the airflow generated when the vehicle is running to cool the oil. The water-cooled type is usually installed in the water chamber of the car's radiator or in a separately circulating cooling water system to cool the high-temperature oil through heat exchange with the cooling water.