A medium viscosity high performance metal cutting lubricant for all machining operations. It may be used neat or as an additive to boost the performance of conventional mineral cutting and forming oils, and may also be used as a die lubricant on severe drawing, punching and presswork operations. Rocol RTD Metalcutting Liquid can be used to gain improved performance on all metal cutting operations where lubricant is applied direct to the workpiece or as a flood coolant.