For modern researchers, waste materials such as plastic and oil have become a serious issue for environmental pollution and health risks. This work aims to analyze various engineering properties of asphalt mix and investigate the impact of pyrolytic char on the partial replacement of asphalt binder. In different proportions of 6, 8, 10, and 12% by weight of asphalt binder, pyrolytic char takes the place of asphalt binder. The outcome of the experiment demonstrates that the binder stiffens and gets stronger. The asphalt binder has demonstrated the best results in terms of strength, hardness, and stiffness at 8% replacement. Certain properties of the binder are negatively impacted by increased stiffness. Hence, waste engine oil is used as a modifier for reducing the stiffness properties, and the outcome is favorable. By weight of the partially replaced binder, 3, 5, and 7% of the waste engine is added. According to test results, 5% of the binder's initial characteristics have been recovered. Indirect tensile strength has increased, and creep deformation has decreased along with improvements in Marshall Stability values. Additionally, the tensile strength ratio is below the allowable threshold. Multiple test results indicated that a combination of 8% pyrolytic char and 5% waste engine oil, i.e., COMB 8–5 meets every requirement as VG30.