Mobil 1 ESP X1 0W-30 synthetic motor oil has been expertly engineered to help prolong the life and maintain the efficiency of emission systems in both diesel and gasoline powered automobiles. Formulated to be fully compatible with the latest Diesel Particulate Filters (DPF's) and Gasoline Catalytic Converters (CAT's), it replaces Mobil 1 ESP Formula M 5W-40 and Mobil 1 ESP 0W-30.