In our factory we use MOL (Hungary)hydraulic and lubricating oils. Does any one know a value of acid number for this oils?

andja,

Your best bet is to contact MOL rep or to send sample of your new oil to a lab, and find out the AN value. I tried to find some info for MOL’s lubes and hydraulic oils

(see link: http://www.mol.hu/en/business_centre/products/lubricant...mol_turbokomol_68_k/

It seems that Hungary is still 50 years back from the Western countries as far as the disclosure and availability of technical data of their products to potential or existing customers is concerned. They might be a part of EU, but unfortunately, they still cherish and practice that well known old Russian mentality of poor disclosures and crappy service to the customers. I am glad I don't have to deal with this BS. Good luck to you!