The performance properties of the initial components and finished product were evaluated during fabrication of models of commercial lube oils by scattered light correlation spectroscopy. This method allows determining the size and average radius of colloidal formations and the stability of colloidal solutions against separation. Using the data obtained, changes can be made in the manufacturing technology and formula of the oils by changing the mixing temperature and parameters of the initial components: the indexes of the base, the sequence of incorporating the additives, and the concentration and composition of the additives.