Perfecto HT 5 is based on a solvent refined, high viscosity index mineral oil specially selected for its high thermal and oxidation stability. It is primarily intended for use in enclosed and sealed systems. It also has applications, at lower temperatures, in systems open to the air. Perfecto HT 5 has a low viscosity which is essential when operating under turbulent flow conditions to achieve very high heat transfer rates.
Castrol Perfecto HT5