Mobil 1 5W-30 ESP Synthetic Motor Oil, 1 Liter Bottles (case of 12) Mobil 1 ESP Formula 5W-30 is an advanced performance synthetic motor oil made with a proprietary blend of leading edge components formulated to be fully compatible with the latest Diesel Particulate Filters (DPF's) and Gasoline Catalytic Converters (CAT's). It is designed to help deliver outstanding performance and protection in conjunction with fuel economy benefits. Helps reduce particulate build-up in Diesel Particulate Filters Helps reduce poisoning of Gasoline Catalytic Converters Helps reduce deposits and sludge build-up to enable long and clean engine life