Why is biocide added to fuel?

Biocide is added to fuel primarily to prevent the growth of bacteria and fungi. These microorganisms thrive in fuel, especially in the presence of water, which can accumulate in storage tanks or during transportation. The presence of bacterial and fungal growth can lead to the formation of sludge and other deposits, which may clog filters, disrupt fuel flow, and adversely affect engine performance. By incorporating biocides, the proliferation of these harmful organisms is inhibited, thereby maintaining the integrity of the fuel and ensuring optimal engine operation.

While other options may relate to fuel properties, they do not address the specific issue of microbial contamination that biocides are designed to combat. Enhancing combustion properties, improving color stability, or regulating temperature do not accurately describe the primary function of biocides in fuel management systems.