How does high viscosity oil behave when flowing through an engine?

High viscosity oil has a thicker consistency compared to low viscosity oil, which affects its flow characteristics in an engine. When high viscosity oil flows through an engine, it does so sluggishly. This is due to its resistance to flow, stemming from the greater internal friction that occurs within the oil itself. This slower movement can impact lubrication effectiveness, leading to increased wear on engine components if the oil does not circulate adequately.

In contrast, lower viscosity oils are designed to flow more freely, providing quicker lubrication and reducing friction more effectively. Therefore, while oil is crucial for engine operation, its viscosity is a key factor influencing how well it flows. Understanding this behavior is essential in selecting the right oil for specific engines and operating conditions.