FOPCO Inc. provides an on-site, mobile diesel fuel polishing and tank cleaning service. Our fuel oil polishing process connects to the fuel system, removes bottom water, sludge, entrained water, and filters solids and biological residue through filters that remove particulates down to 1 micron. We restore contaminated diesel fuel to a better-than-refined condition, a degree of quality that meets or exceeds recommendations of the leading diesel engine manufacturers. This prevents fuel filter clogs and helps ensure reliable operation of diesel engines. FOPCO has saved its clients thousands of gallons of fuel and associated costs each year through our 1 micron filtration, and Natural Enzyme fuel and tank treatments. FOPCO has built its reputation on trust, reliability and quality of work.