Nowadays, prices are increasing and the decline of fossil fuels has generated the need to find alternative lubricants from non-edible oil seeds. To address energy shortages, alternative energy sources must be identified. Vegetable oils are recognized as alternatives to mineral oils for lubricating base oils due to certain inherent technical properties and their biodegradability. Vegetable oils with high oleic content are considered the best alternative to substitute conventional mineral oil-based lubricating oils and synthetic esters. This paper studies the extraction of oil from custard apple seeds and its composition and physicochemical properties. Custard apple seeds were tested for their physicochemical properties in the production of bio-lubricants. Research indicated 27.5% oil content in the seeds. The bio-lubricant was analyzed for quality tests such as density, viscosity, flashpoint, fire point, and calorific value. © 2021 Elsevier B.V., All rights reserved.