Mobil DTE Oil Heavy Medium is a premium performance ISO Viscosity Grade (VG) 68 circulating oil. DTE Oil Heavy Medium is designed for use in steam and hydro turbine sets, bearings, pumps and other systems where long service life is required. It is formulated from highly refined base stocks and an additive system that provide extremely high levels of thermal and chemical stability, rapid separation from water and excellent rust and corrosion protection. Additionally its air release properties help to make Mobil DTE Oil Heavy Medium an excellent choice where ISO VG 68 double inhibited R & O oils are recommended.