more rapid heat dissipation. mobiltherm heat transfer oils are recommended for use in both closed and open, cold-oil sealed, indirect heating and cooling systems in all kinds of industrial processes. features and benefits mobiltherm oils are important member of the mobil brand of specialty fluids that have gained a reputation for performance and reliability, even in severe applications. application of the most modern refining techniques is a key factor in the excellent features of these products. mobiltherm 603 and 605 offer the following benefits: advantages and potential benefits features