Mobil Delvac XHPTM ESP FE 5W-30 is an extra high performance diesel engine oil engineered to provide outstanding protection and fuel economy potential* in modern, high performance, low emission engines used in severe on-highway applications. This engine oil is specifically designed to meet the latest Volvo, Daimler, Detroit, Mack, Renault, and Cummins requirements for their newest diesel engines. This engine oil is formulated with high quality base oils which provide excellent low temperature fluidity, high temperature viscosity retention, volatility control. The base oils, the additive system, and the lowered film viscosity (HT/HS) contribute to fuel economy improvement potential. The advanced additive system has been expertly engineered to help prolong the life and maintain the efficiency of emission reduction systems such as the Diesel Particulate Filter (DPF). *The fuel economy potential is based on experience of comparing the 5W-30 with a 10W-40 & 15W-40 Features a