 This study examined the effects of adding diesel oil to a lubricant mixture on the size and concentration of oil droplets produced during mechanical generation. It found that as the amount of diesel oil added increases, the number of small droplets decreases while the number of larger droplets increases. Additionally, the study showed that the addition of diesel oil leads to an increase in the number of droplets with a diameter of less than five microns, indicating a greater potential for ignition in the engine's crankcase. This article was authored by Leszek Chibowski, Marcin Chepnik, Kater Shnigodzinska, and others.