Series of transparent ,light colored, chlorine-free ,sulfur-free tri-purpose oils for use as cutting oils, machine tool lubricants and hydraulic fluids in certain machine tools. Formulated with a unique ,non-staining passive EP additives system ,a special non-fatty lubricity additive ,rust and oxidation inhibitors, and an anti-mist additive.Specifically designed for applications where staining by chlorinated additives could be a problem ,or where oils containing chlorine may present a waste or storage problem