Profile: Capital Filtrations Inc specializes in providing self-sustaining industrial filtration products, diesel lubricants, and additives. Our bypass filters range in sizes from 5inches to 12 inches and are retrofitted on any medium to heavy-duty vehicle including trains, and cement trucks. This primary filter has a low micron rating at about 40 so it leaves behind solid contamination such as dirt, paint chips, small rocks, colloid carbon, wax crystals, sludge, asphaltines, and rust. This combination of mixed contamination wreaks havoc on your engine leading to early engine failure and costly repairs.