<p>Internal combustion engines use engine or lubricating oils to reduce friction and wear on relative motion components. By creating a layer between the moving surfaces, lubricating oil sustains the load and removes the metal-to-metal contacts. By combining nanoparticle additives (Al₂O₃, CuO, ZnO, MoS₂, TiO₂, SiO₂, CB, SWCNH, CeO₂, Cu, Zn, and diamond nanopowder, etc.) with base oil, these nanoparticles improve the lubrication properties of engine oils and lubricants by lowering wear and friction, improving heat dissipation, and improving anti-wear properties. Advanced technologies are used to improve the tribological properties of engine oils. This extends the life of the working components. Lubricant properties like wear and friction, viscosity, viscosity index, pour point temperature, flash point temperature, and heat dissipation are all impacted by the concentration of nanoparticles. The lubricating properties of nanolubricants are also influenced by the non-homogeneous dispersion of nanoparticles. The constraints of combining nanoparticles are to achieve uniform dispersion and dispersion stability over a long time. Although the goal of combining nanoparticles is to maximize their advantages, mineral-based lubricating oil has some drawbacks. Bio-based lubricating oils are substitutes for mineral-based lubricants. Utilizing bio-based lubricants has advantages for the environment and the economy.</p>