The integration of commercial fuel additives in diesel engine generator systems presents a viable and cost-effective strategy for enhancing operational efficiency, reducing harmful emissions, and lowering maintenance costs in power plants. This study investigates the role of different fuel additives, including cetane improvers, detergents, lubricity enhancers, and emission reducers, in optimizing the performance of diesel engines. By improving fuel combustion, increasing fuel system cleanliness, and reducing engine wear, these additives can significantly boost the overall efficiency of power generation systems. Quantitative analysis shows that fuel additives can lead to a 2-5% improvement in fuel efficiency, primarily due to more complete combustion and better fuel utilization. Lubricity enhancers further protect critical engine components from wear, extending equipment lifespan and minimizing operational downtime, while detergents prevent the buildup of deposits in fuel injectors, ensuring consistent and optimal fuel atomization. A notable example of these benefits can be seen in a diesel-powered plant in India, where the use of commercial fuel additives resulted in a 4% increase in fuel efficiency, alongside a 15% reduction in NOx emissions and cleaner engine operation. Despite initial costs associated with the adoption of fuel additives, the long-term savings from enhanced fuel economy, reduced emissions penalties, and lower maintenance costs offer considerable financial and environmental benefits. In conclusion, the use of commercial fuel additives can play a crucial role in improving the sustainability and operational performance of diesel engine power plants, contributing to the global shift toward cleaner energy solutions.