This research aims to optimize the performance of PMS and AGO in automobile engines by leveraging fuel additives. To achieve this, the study focuses on purifying PMS and AGO by removing impurities and enhancing their octane and cetane ratings. The purification process involves a three-step procedure: firstly, concentrated sulfuric acid, hydrogen peroxide, and acetic acid are added to eliminate impurities; secondly, caustic soda is introduced to neutralize the acidic solution; and finally, aromatic compounds such as methanol, phenol, hexanol, and M.E.K are added to boost the octane and cetane ratings of PMS and AGO.By refining PMS and AGO through this process, the research seeks to improve their combustion efficiency, reduce engine knocking and pinging, and enhance overall engine performance. The use of fuel additives is expected to optimize the fuelβs chemical properties, leading to better fuel economy, lower emissions, and increased engine durability.The studyβs findings are anticipated to contribute significantly to the development of high-performance fuels, providing a cleaner and more efficient energy source for the transportation sector. By enhancing the quality of PMS and AGO, this research aims to reduce the environmental impact of automobile emissions, promote sustainable energy solutions, and support the growth of the automotive industry. Ultimately, the research seeks to provide a comprehensive framework for fuel additive technology, paving the way for innovative solutions in the field of fuel engineering.