The widespread usage of petroleum-based lubricants has caused environmental and operator health problems; therefore, a substitute for these lubricants must be investigated. Bio-based lubricants give superior lubricity as compared to petroleum-based lubricants. Modifying a bio-based lubricant's properties is crucial for improving its lubricating efficacy. The efficacy of an ecologically friendly ionic liquid as lubricant additive in a bio-based lubricant is investigated in this research. 2 chloride [C₅H₁₄CINO] was chosen as an addition to improve the performance of bio-lubricants based on coconut and cottonseed oils. Three different mass concentrations of the additive (0.5 wt.%, 1 wt.%, and 1.5 wt.%) were added to the bio-based lubricants. Pin-on-disc studies on AISI 1030 steel/steel contact was performed. The steel sample was then examined further with various techniques such as scanning electron microscopy (SEM) and stylus to identify the lubricant's lubricating mechanism. The results showed that the IL blended into the bio-based lubricant had a positive synergistic impact on lubrication performance of both bio-based oils. Coconut oil+ [C₅H₁₄CINO] 1 IL 1.5 wt.[C₅H₁₄CINO]IL 1wt.% decreases friction coefficient by 40%, wear volume by 45% and improves bio-based oil kinematics. [C₅H₁₄CINO]IL 1.5wt.% increases the friction and wear volume of steel surfaces. The results of the complete experiment demonstrate that ionic liquids can change the behavior of bio-based lubricants, and that the formed IL-based samples are safe for the environment and the machine operator's health.