In machining processes, the environmental footprint reduction is a fact that is been addressed in recent years. In this line, the use of recycled CO2 as cryogenic cutting fluid in those processes is taking advantage in comparison with other lubricooling alternatives to replace oil emulsions in workshops. This technique is characterized by its high cooling capability and its cleaning efficiency. Besides, it is environmentally innocuous due to the CO2 is captured form a primary process to be used as cutting fluid. However, the CO2 has low lubricant properties what implies a challenge to be used in heat resistant alloys because combine both high hardness and low thermal conductivity. Therefore, in this work is explored the use of CO2 combined with biodegradable oil spray under CryoMQL technique for dealing with super duplex stainless steel during turning operations. In particular, the CryoMQL technology was optimized for achieving a successful process through tool life improvement. The results shown that the optimization carried out implies that the use of CryoMQL technique extend tool life a 45% in comparison with the use of conventional oil emulsions, obtaining in this way not only an environmental improvement but also a technical one in this kind of alloys.