Hymat,
You are mixing apples and oranges, all in an effort to undermine usefulness of electrostatic filters, which I see you don’t represent, and which technology is direct competitor to the technology that you are peddling. Your argument by comparing an inorganic salt of a strong acid and a strong base that fully dissociate in water (Na+ and Cl- ions) to stable non-dissociable organic molecules, is completely missing the mark. The fact is that transformer oil has antioxidant additives added to base oil, and is successfully for more than 100 years used as INSULATING fluid in transformers. This is possible because additives dissolved in oil are not dissociating on ions (like the inorganic compound that you offered as an example). Instead, they become a part of hydrocarbon aliphatic or aromatic molecules, and therefore do not conduct electricity.
Also, I have never heard that electrostatic filters affect viscosity in any form or shape. Can you please provide some more info regarding the observed oil thinning that you mentioned in your previous comment?
By the way, I am end user, and don’t represent any company and/or any product, but keep my mind open to learning and evaluating new products and new technologies.
John