Nanoparticles have a significant impact on industrial lubricants, especially in high-stress lubrication scenarios where friction and wear are maximized. In these settings, nanoparticles can enhance lubrication through mechanisms such as micro-bearing effects, protective film formation, polishing, and repair. The hardness and shape of nanoparticles also play a critical role — spherical nanoparticles typically provide superior lubrication due to their ball-bearing effect, while excessively hard nanoparticles can cause actually abrasive wear rather than prevent it. Their tiny size allows them to infiltrate surface irregularities and stay suspended in the lubricant, although improper dispersion due to agglomeration can reduce their effectiveness. Effective preparation, including optimal stirring time and concentration, is crucial to ensure stable dispersion and maintain lubrication performance. Industrial evaluations often use standardized testing methods like the four-ball tribometer and pin-on-disc tests to assess the performance of nano-additives in lubricants. Continued research and development in nanoparticle formulations and dispersion techniques are essential for unlocking the full potential of these advanced additives in industrial lubrication systems.