In some cases, oils are interchangeable, and, in some cases, it can cause serious damage, so we advise against this. Best case scenario your pump’s performance may deteriorate, worst case the whole pump may fail. In fact, the main cause of system problems is indeed caused by mistakes with oil. Especially mixing two types of oils can cause issues and should be avoided. If you want to change over to PFPE oil, your pumps should be handled in one of our authorized service centers. The pump must be completely disassembled and cleaned. It will also have its filters and seals replaced and be regreased.