The idea being that the more passes the oil makes across the cooling front the more heat the oil will be able to dissipate. The purpose of the engine oil cooler is to allow the engines cooling system to remove excess heat from the oil.

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What does an oil cooler do. An oil cooler is essentially any device or machine intended to cool oil but in most instances people talk about it in the context of cars trucks and sometimes airplanes. These types of coolers are usually of the water to oil type of heat exchanger. It is only operational when the motor is running. It is installed in line with the vehicles oil delivery system and then the oil pump pushes oil through the cooler and back into the engine. In most vehicles on the road engine oil is fed to the oil coolers from an adapter that is located between the engine block and the engine oil filter. This means the amount of times the oil will pass across the length of the cooler before it is aloud to exit.
The oil enters the oil cooler at a high temperature circulates through tubes that are lined with heat releasing fins and then exits the cooler at a colder temperature ready to recirculate and. It is used in hot weather or on long trips to keep the engine moving on the go. Oil cooler is a device that is used to cool engine oil and maintain the engine at a constant temperature. These types of coolers are usually of the water to oil type of heat exchanger. The oil cooler is based on the same flow through principle as the transmission cooler. It is fitted in cars trucks and some airplanes.
Its purpose is to cool the oil as it passes through the coils and it only operates when the engine is running. Lowering the temperature of engine oil has many advantages especially in air cooled motors. In these settings the cooler basically acts as a small radiator that helps keep an engine cool by keeping the oil supply at a consistent temperature. The oil cooler is designed to come in a one pass two pass or even triple pass design. The purpose of the engine oil cooler is to allow the engines cooling system to remove excess heat from the oil. If a vehicle manufacturer recommends an oil cooler for towing then it would be needed for that vehicle.
Oil coolers are essentially small radiators that are situated in front of an engines cooling system in an automobile. Engine oil coolers are small radiators placed in front of the coolant system on an automobile that lower the temperature of the oil as it passes through the coils. The cooler is important as it improves efficiency and enhances the performance of the engine.