Vegetable oil as bio-lubricant and natural additive in lubrication: a review

Due to the decreasing petroleum reserves and environmental issues, the approach of using vegetable oil as lubricant has drawn the researchers’ attention. In comparison to mineral-based lubricant, the vegetable based-oil bio-based lubricant has better physical properties, high lubricity, renewable, and biodegradable. The source of bio-based lubricant can be virgin natural oil, or processed fruit waste. This review discusses the vegetable oils as bio-lubricant and natural additive in lubrication according to the current findings. A brief discussion of physicochemical and tribological properties findings completes the review.