What is different in function of lube oil and jacking oil?

Lube oil primarily serves to reduce friction and wear between moving parts in machinery, providing lubrication, cooling, and cleaning properties. In contrast, jacking oil is used during the startup phase of machinery, particularly in large turbines or engines, to lift and support rotating components before they reach operational speeds. Jacking oil typically has lower viscosity and is designed for temporary use, ensuring smooth engagement and protection during initial operation, whereas lube oil is meant for continuous use under normal operating conditions.