<p><b>Abstract</b>—An empirical mathematical model for the dynamics of friction force changes is used to analyze the tribological properties of lubricating compositions based on TSp-10 transmission oil containing <i>C</i> = 1–4&#xa0;wt&#xa0;% Mg₆[Si₄O₁₀](OH)₈ serpentinite microparticles. The minimum friction force (13% lower than that of the base lubricant) is achieved at a serpentinite content of 2.1 wt %, and the minimum wear (46% lower than that of the base lubricant) is achieved at 2.6 wt %. An analysis of the dependence of the wear crater diameter on the serpentinite concentration using the Hertz theory made it possible to establish the ranges of serpentinite concentrations at which oxidative wear or seizure occurs. Seizure of the rubbing surfaces is possible at a serpentinite content <i>C</i> = 0–0.9 wt % and <i>C</i> &gt; 4.35 wt %. At <i>C</i> = 0.9–4.35 wt %, a lubricant layer retains its load-bearing capacity.</p>