Product Details: Keeping you Ready for the Road Ahead™, the Power Service Bio Kleen® Diesel Biocide serves as an effective fuel cleaning additive that provides the best protection against microbes (bacteria and fungus included) in the fuel system. Microbial contamination significantly increases corrosivity. This dual-phased fuel additive operates efficiently in both diesel fuel and water, effectively killing microbes. Improve your fuel performance with this heavy duty diesel biocide. FleetPride is your First Click in Heavy Duty®.