In the article, acid number as a parameter characterizing engine oil were characterized. The next part of the article discusses the phenomenon of aging and degradation of engine oil. The factors that influence on this phenomenon have also been analyzed. In the further part of the article, the methodology of testing the used oil samples with the addition of effective microorganisms and silver solution was described. In the main part of the article the measuring test stand and acid number value for fresh and used oil compared to oils with the addition of microorganisms and a solution of silver and colloidal silver was shown. Next the analysis of the influence of these additives on the acid number value was made. The article was completed conclusions.
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Effect of additives of the effective microorganisms and silver compounds on the flash point of new and used engine oil Rafał Krakowski Combustion Engines
Influence of Effective Microorganisms, Colloidal Nanosilver and Silver Compounds on Water Content in New and Used Engine Oil: A Preliminary Study Rafał Krakowski Applied Sciences
Analysis of lubricating oil degradation and its influence on brake specific fuel consumption of a light-duty compression-ignition engine running a durability cycle on a test stand Rafał Sala, Kamil Węglarz, Andrzej Suchecki Combustion Engines
Differential scanning calorimetry as a tool to assess the oxidation state of cold-pressed oils during shelf-life Mahbuba Islam, Anna Kaczmarek, Jolanta Tomaszewska-Gras Journal of Food Measurement and Characterization
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