The document discusses microbial contamination in fuel and provides information on Kathon FP 1.5, a broad-spectrum antimicrobial agent, for treating contaminated fuel. It outlines signs of contamination like hazy or sludgy fuel, blocked filters, or foul odors. It recommends verifying contamination with a fuel test kit and treating the fuel with Kathon FP 1.5 at dosages of 100ppm, 300ppm, or 1000ppm for prevention, cure, or severe problems respectively. The effects will be seen within 6-36 hours and fuel will remain protected for up to 8 weeks.