To prolong the life of your heating system, vehicles and machinery, prevent breakdowns and improve performance, care must be taken of three main items not wanted in your tank: PARTICLES, these mostly come from re-polymerisation, a process affecting modern oils.
This is in addition to other solids from dirt and dust in the air, and rust in pipes and tanks. WATER, which basically comes from water in the air condensing. And lastly, there are BACTERIA, MOULDS AND YEASTS, micro-organisms live in heating oil from the time it leaves the refinery.
Under certain conditions of heat and the presence of water, these colonies can proliferate unchecked and may lead to total blockage.