APRIL HEAT TRANSFER OIL is a premium quality heat transfer oil made with pure virgin base oil and APRIL NANO 1™ lubricant technology for unsurpassed protection and performance. Specially formulated to provide long service life and excellent thermal efficiency in a variety of industrial applications while resisting oxidation and thermal degradation. Recommeded for non-pressurized, liquid phase, closed heat transfer systems operating at bulk fluid temperatures up to 315°C. Available in two ISO viscosity grades.