Whatever the fluid manufacturer claims, the only thing that can ensure extremely long metalworking fluid life is a very efficient system for keeping the fluid clean. Tramp  oil, abrasive metal fines and other particles are an integral part of any system and you can’t run away from them, especially when you have a centralized sump servicing several machines. This machine from Alfa Laval claims extended fluid life up to six times, and up to ten years. They can remove abrasive metal fines and other particles as small as 2 μm. Alfa Laval has long been a world leader in fluid seperation technology, so it is no surprise that this technology arrives from their engineers.