REXOIL DIAMOND PRO RX 5W/30 is full synthetic engine oil for new generation engines which is developed with high performance additives and synthetic base oils. It is 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). Helps to reduce particulate build up in Diesel Particulate Filters and reduce deposits and sludge build-up to enable long and clean engine life.