Diesel Fuel Anti-Fungal Additives
WARNING: This page does not describe the selected car, but rather 20 other vehicles, including the 1987 GMC Pickup, 1987 GMC Cab & Chassis, 1987 Chevrolet Pickup, 1987 Chevrolet Cab & Chassis, and 1986 GMC Pickup. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
If fuel contamination due to fungi or other microorganisms is suspected a fuel additive with a biocide may be used. Follow the manufacturers dosage as recommended on product label. Use biocides ONLY when necessary, excessive use can may cause other fuel system problems.