In any cases when it is necessary to refill or top-up oil levels, in the case of mineral oils unused oil must be used that meets the standard IEC 60269, and that has the same rating as the oil being used. In some cases it may be necessary to perform a compatibility test to determine the viability of unused oil mixtures, in which case we recommend consulting the supplier.
Tests and regulations:
- Foaming: ASTM D 892
- Detection of potentially corrosive sulphur: UNE-EN 62535:2009
- Oxidation stability of non-inhibited oils (Type U): UNE EN 61125:1996
- Oxidation stability of inhibited oils (Type I): UNE EN 61125:1996