What is an auxiliary engine cooler?
Similarly one may ask, when would an auxiliary engine oil cooler be needed?
Towing - If your truck is used for towing or other heavy-duty work, an auxiliary oil cooler is something you want to think about. Oil coolers dramatically reduce the temperature of the oil in your engine, preventing it from overheating when you need it most.
Beside above, what is an auxiliary radiator?
Less commonly, power steering fluid, brake fluid, and other hydraulic fluids may be cooled by an auxiliary radiator on a vehicle. Turbo charged or supercharged engines may have an intercooler, which is an air-to-air or air-to-water radiator used to cool the incoming air charge—not to cool the engine.
The oil cooler on any production vehicle is an essential engine component designed to keep modern cars, trucks, and SUVs running smoothly on the roads they travel daily. The purpose of the engine oil cooler is to allow the engine's cooling system to remove excess heat from the oil.