Yes! Pentosin oil is an oil that is similar to brake fluid. This hydraulic oil has a shelf life of 4–5 years and is sealed in a container. When using the vehicle and changing from warm to cold as well as removing the particles from the inner walls of the hydraulic hoses, it is always our recommendation to change every 30.000 kilometers. The hydraulic oil change is not always tied to kilometers, but the color is also crucial when checking. Originally it is light green or mint green, should the discoloration develop towards brown or even black, it is time to replace the oil. Another reason why the hydraulic oil (Pentosin) should be replaced is that it is hygroscopic, i.e. it absorbs humidity, so that it has to be immersed after a maximum of 5 years anyway to avoid rust and water in the system.