The consumption of materials is too high due to the short lifetime of these. The necessity to use an efficient and "green" lubricant grow more and more. In the present study, a halogen-free lubricant was used in a steel-steel contact and the friction and wear were measured. The work was performed to analyze the protective tribofilm formed between the two moving parts. The experiments show a lower friction and wear when the new lubricant is used than with a conventional base oil. The XPS analysis confirms the low friction especially because of the presence of specific compounds in the tribolayer. Further analysis will be performed in a future work to confirm the chemical composition of the thin film.