Starboat Synth HTC 220 (20L) series are premium quality synthetic heavy duty industrial chain oils In the area of high temperature lubrication, HTC oils have given that “edge” in comparison to both well-known and exotic brands of synthetic oil. When deposits like carbon and varnish are intolerable, HTC oils are advised. HTC oils provide outstanding thin-film evaporation properties. But residue is a much more important problem. High amperage draw and wear are caused by carbon deposits and varnish. When applied in the proper quantity, HTC oils won't contribute to these deposits. HTC lubricants consist of a unique blend of synergistic ash-less additives and complicated synthetic base fluids. HTC oils are designed to withstand oxidation at high temperatures and provide protection from a corrosive environment. At high temperatures, HTC oils can sustain fluid film lubrication on bearings and chain pins.