What action should be taken if oil viscosity needs to be decreased for better flow?

Raising the temperature is a well-established method for decreasing the viscosity of oil, which in turn improves its flow characteristics. Viscosity refers to the resistance of a fluid to flow, and temperature has a direct impact on this property. When the temperature of oil is increased, the molecular activity within the fluid becomes more vigorous. This increased activity allows the molecules to move more freely, thereby reducing the friction between them and resulting in lower viscosity.

This principle is commonly utilized in various applications, including engines and hydraulic systems, where maintaining optimal lubricant properties is crucial for efficient operation. By heating the oil, you encourage better lubrication, reduce wear on components, and enhance overall performance.

In contrast, increasing the volume, lowering the concentration, or changing the type of oil does not effectively address the issue of viscosity in the same direct manner as raising the temperature does. Each of those options may have different implications for the fluid's properties, but they do not inherently lead to an improvement in flow related to viscosity reduction.