The Fachagentur Nachwachsende Rohstoffe e.V. (Expert Agency for Renewable Resources) regularly organises a bio lubricants congress where experts from research, industry and practice can discuss about bio lubricants. At this years bio lubricants congress in Hagen, Dr. Hermann Josef Stolz, member of the Board of Peter Greven GmbH & Co. KG, has not only been a participant, he was also a referent and talked about the topic "Influence of the raw material selection on the application properties of synthetic esters." During the presentation Dr. Stolz explained the most important parameters of the selection of raw materials and illustrated their impact on the properties of synthetic esters through the following studies: Ageing properties in TOST- process (Turbine Oxidation Stability Test), foam test, stability, demulsifying properties, filterability and viscosity characteristics. Dr. Stolz and his research and development team established this application studies in the new, state-of-the-art laboratory at the headquarter of Peter Greven Group in Bad Münstereifel and transferred them into remarkable results. Some of them were presented at the bio lubricants congress 2014 by Dr. Stolz.