Fuel additives are special chemicals added to fuels like gasoline or diesel to improve their performance and efficiency. They can help clean the engine, reduce emissions, and prevent issues like knocking or corrosion. By using fuel additives, drivers can often achieve better fuel economy and a smoother ride. There are different types of fuel additives, including detergents, octane boosters, and anti-gelling agents. Each type serves a specific purpose, such as enhancing combustion or protecting the fuel system. Many vehicle manufacturers recommend certain additives to keep engines running optimally and to extend their lifespan.