Quality / Laboratory


The laboratory of the Modriča Oil Refinery meets European and world standards when it comes to the qualification of physical and chemical tests of liquid petroleum fuels, petroleum products, brake fluids, coolants and water.

Potentials of the testing laboratory

The testing laboratory has been formed 58 years ago as a special organizational unit of the Oil Refinery Modrica.

Nowadays it is a modern, accredited laboratory operating within the joint stock company Oil Refinery Modrica, engaging 23 indeterminate employees, who are able to carry out more than 180 different physicochemical, mechanical and electrical types of testing.  

Testing services

The testing laboratory provides its services to third parties. The primary interest of the testing laboratory is to always perform the testing in accordance with the given methods and customer requirements for the purpose of ensuring full satisfaction, and in order to continue the trend of increasing the efficiency and effectiveness of its entire workflow. 

  • Testing of physicochemical characteristics of lubricants and coolants used in industry and traffic, which are produced on the basis of mineral and synthetic raw materials
  • Testing of glycol-based engine coolants 
  • Testing of break fluids, 
  • Testing of lubricant greases
  • Testing of paraffin
  • Testing of waters (both industrial and waste waters)
  • Testing of raw materials used in the manufacturing of these products, as well as of chemicals 
The list of testing methods

Testing request

Each request for the testing of lubricants, oils and related products, falling under the scope of laboratory activities, has to be made in the form or written testing request. Please send your request for the testing to the following email:


Laboratory nowadays

The strength of the testing laboratory lies in its modern equipment and professional and trained staff, who carry out fast and reliable testing services.  The development of the quality system provided for the up-to-date functioning of the testing laboratory, in compliance with the requirements of ISO 9001, ISO 14001, ISO 18001 and BAS EN ISO/IEC 17025 standards.

The testing laboratory was accredited in 2004 pursuant to the  BAS EN ISO/IEC 17025 requirements. Decision no. LI-09.01 confirmed its capacity and competence for carrying out 60 different accredited standard testing methods and liquid petroleum products sampling.  

The testing laboratory staff are engineers and technicians with rich experience, skills and knowledge in the field of testing petroleum products, related products and chemicals. We are constantly working on acquiring new knowledge, introducing new testing methods and training our staff to enable them to handle new testing equipment/devices.

Regular participation in international inter-laboratory testing schemes (Institute for Interlaboratory Studes – IIS, Spijkenisse, the Netherlands) speaks in favor of the qualification and precision of our laboratory staff.   

Primary goal of the testing laboratory is to provide services to other Oil Refinery Modrica departments. The testing laboratory is included in the entire workflow of basic oil mixture processing  (BUS), production of basic oils and paraffin, lubricants, functional fluids, as well as the in the process of industrial water production and the quality testing of waste water.
Testing results are a trade secret, and they are treated accordingly. All users of our testing services, upon their request, are granted access to the on-site testing of their samples.