An oil cooler is a separate, smaller radiator to an engine's main radiator, which maintains an oil supply at a consistent, optimal temperature. Its purpose is to cool the oil passing through the coils, thus improving the engine and the transmission's lifetime. They are situated in front of an engine's cooling system.

Oil Cooled Chillers utilize oil as a cooling medium, circulating it through the system to absorb and dissipate heat. This unique cooling mechanism distinguishes them from traditional air or water-cooled systems.