We investigate the chemical, physical and tribological properties of nanolubricants consisting of epoxidized sunflower oil with Cu nanoparticles as additive, the latter produced by magnetron sputtering at distinct current levels in the deposition, to improve the development of nanolubricants by enhancing the nanoparticles dispersion. The nanolubricants are here characterized by Fourier Transform Infrared spectroscopy, zeta potential, UV-vis absorbance spectroscopy, small angle X-ray scattering and scanning electron microscopy. After all, the tribological properties of the bionanolubricants are investigated using a high frequency reciprocating ring equipment, scanning electron microscopy, and energy dispersive spectroscopy. Our results place the nanolubricants produced using the magnetron sputtering technique has excellent nanoparticle dispersion, as well as good tribological performance.