Look at the alkali content. If it is excessive, it is recommended not to continue using it to avoid accidents. After all, heat transfer oil generally works at high temperature.

Mixing alkaline substances in heat transfer oil will make the performance of heat transfer oil worse, so it is generally not recommended to continue using it. If the quantity is large, you can contact the technical personnel of the heat transfer oil manufacturer to test the product, and decide whether to replace or treat the heat transfer oil according to the results.