I think you are confusing Sinn technologies. DIAPAL technology is applied only to the escapement to ensure long-term accuracy of the movement. The rest of the movement requires periodic cleaning and lubrication just like any other ETA movement. Ar-Dehumidifying technology is employed to retard the aging process of the oils and keeps the movement functioning properly longer. I can't tell you what the service intervals are (no time to Google right now) but I can tell you DIAPAL watches have a five year warranty and Ar watches have a three warranty.What are the service intervals for the Sinn diapal watches? I know they are oil free hence supposedly doesn't need maintenance. But I don't know if that is actually true.