Mobil Delvac 1320, 1330, 1340 and 1350 are high performance monogrammed oils designed for diesel engines. The oils are formulated with technically advanced base oils and a balanced system of additives. They are specially designed to provide good performance in turbocharged engines with intercooler operating under demanding conditions in both the transport and construction industries. The Mobil Delvac 1300 series oils are used for a wide range of applications where monogrammed oils are recommended.