Oil coolers are heat exchangers utilized to reduce engine oil temperature, primarily in turbocharged, high-performance, or heavy-duty applications. Typically mounted remotely or integrated within the oil pan, they function by dissipating heat from the oil via a dedicated cooling circuit, often leveraging coolant or ambient airflow. Core designs utilize tube-and-fin or plate-fin configurations for maximized thermal transfer efficiency. Construction materials commonly include aluminum alloys for lightweight properties and thermal conductivity. Thermostatic control valves are frequently incorporated to regulate oil flow based on temperature, optimizing warm-up times and maintaining consistent oil viscosity.