Biofuel additives are substances incorporated into biofuels to enhance their performance and environmental characteristics. These additives can improve combustion efficiency, reduce emissions, and prevent engine corrosion and wear. Common biofuel additives include ethanol, which is blended with gasoline to increase octane ratings and reduce Greenhouse Gas Emissions. Another widely used additive is biodiesel, which is mixed with conventional diesel to improve lubricity and lower emissions of pollutants like particulate matter and sulfur oxides. Additionally, certain additives, such as enzymes and antioxidants, are employed during biofuel production processes to enhance yield and stability. Overall, biofuel additives play a vital role in optimizing biofuel properties, ensuring cleaner combustion, and promoting more sustainable energy use.