<p>Seeking approaches to improve cars’ efficiency is a smart move if you want to raise their performance. The radiator, an integral part of the car’s cooling system, is one of those parts. Traditional radiator coolants like water and ethylene glycol have been around for quite a while. Nevertheless, a new competitor has emerged with the advent of nanotechnology: nanofluids. To make them, ordinary fluids have their thermal properties improved by adding tiny nanoparticles, typically ranging in size from 1 to 100 nanometers. The purpose of this research was to evaluate and contrast conventional radiators that use fluids like water and ethylene glycol with those that employ nanofluids, which contain suspended nanoparticles. Their heat transfer rate, thermal efficiency, and cooling performance will be investigated in the study. Despite their widespread use and affordable price, these offer subpar thermal performance. The excellent thermal properties of nanofluids are due to their high thermal conductivity and heat transfer rate. The objective of the present research is to compare and evaluate the benefits and drawbacks of each fluid type to determine the optimal cooling method for contemporary vehicles. Improved radiator designs might increase vehicle efficiency and fuel economy, which could be a result of this study.</p>