A top-quality rust-and-oxidation-inhibited (R&O) oil that achieves the rigid requirements often imposed on steam-turbine lubrication. Quality turbine oils are also defined by good demulsibility, a requisite of effective oil-water separation. Turbine oils are widely utilized in other exacting applications for which long service life and dependable lubrication are required. Such compressors, hydraulic systems, gear drives, and other equipment. Turbine oils can also be used as heat transfer fluids in open systems, where oxidation stability is of primary concern.