What happens to oil as temperature increases?

As the temperature of oil increases, it flows more easily due to a reduction in viscosity. Viscosity is a measure of a fluid's resistance to flow; warmer temperatures reduce this resistance, allowing the oil molecules to move more freely. This property is particularly important for oil in heating systems, as it ensures efficient movement through pipes and components, enhancing the system's performance.

In contrast, as temperatures decrease, oil can become more viscous and harder to pump, which can lead to operational difficulties. Therefore, the behavior of oil concerning temperature is fundamental to its use in heating applications, particularly in maintaining efficiency and performance in oil heat systems.