Nanotechnology Perceptions ISSN 1660-6795 www.nano-ntp.com Nanotechnology Perceptions 20 No. S12 (2024) 262-274 Rheological Insights and Optimization of Bio Nano Lubricants in Tribological Systems S. Nithya Poornima 1 , V. Shantha 2 1 Assistant Professor, Department of Mechanical Engineering, BMS Institute of Technology and Management, Bengaluru-560119, India, nithyapmech@bmsit.in 2 Professor, Department of Mechanical Engineering Sir M. Visvesvaraya Institute of Technology, Bengaluru-562157, India The Friction being an important tribological properties for lubrication studies. Fundamental feature of the lubricant is to reduce friction between the two surfaces and hence the life of the material. This research focuses on studying the advantage of utilizing the naturally available Pongamia oil that being the bio lubricant as an alternative lubricant engine oil. Commercial oil although available in plenty they have contributed to environmental hazards in one way or the other. And more over these Pongamia trees and seeds are available in plenty in India. The main intension of this research was utilizing the naturally available resources. Nano additives have been added to enhance the bio lubricant properties and to improve the efficiency in the system. Rheometer is an equipment which is used to analyze the viscosity of the samples and their response with respect to shear stress and strain. The different variations of the sample have been incorporated for the studies. The Samples viscosity are empirically considered in the temperature range of 20 to 30∘ C. Keywords: Nanomaterials, Pongamia oil, Rheometer, Viscosity, Taguchi, optimization. 1. Introduction The most important of any lubrication system is reduce friction and hence wear rate which can be achieved by constantly dispense the oil the moving components. The impact of lubricant oil on an Automotive engine is to reduce the heat generated and to seize the vehicle quickly. Although the filter is a part of the system whose primary objective is to eliminate pollutant and dust particles and to ensure smooth flow across the system. The Lubricant oil is prone to lubricate the camshaft bearings. The surplus oil in the Machine is then made to drains back to the sump. The importance aspect of any engine lubrication system is to minimize the overall loss, reduce wear and tear, to imbibe a good cooling system, to protect its component parts and to ensure tight fit that is radiating inside the cylinder.