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The Testing Laboratory Directorate (TLD) is accredited to perform testing of various physicochemical characteristics of oil samples.


Tests are performed on fresh and used oils with mineral and synthetic origin:

  • motor oils;
  • transformer oils;
  • aviation oils;
  • hydraulic oils;
  • reductive oils;
  • turbine oils;
  • compressor oils;
  • industrial oils and others.


The testing equipment is based on modern and precise methods for the quality evaluation of oils. All apparatus are delivered from acknowledged laboratory equipment manufacturers.


The characteristics of the products are determined in accordance with Bulgarian and international standards – BDS, ASTM, ISO and EN.


An assessment of the products is prepared in accordance with the acting normative documents or a technical specification, submitted by the client.


If the client requires it, the test reports can also be issued in English.


                                         The full scope of accreditation of TLD for testing of oil samples can be found here.