Shell Rotella T4 15w-40 (Formerly Shell Rotella T Triple Protection) uses the latest "Low-SAPS" additive technology to protect under the most severe conditions found in modern low emission engines. The protective power of the oil is enhanced through the use of high purity "Group II" base oils that provide increased additive activity. Shell Rotella T4 15w-40 delivers significant improvements in wear protection, deposit control and resistance to breakdown under high temperatures. The exclusive low-ash formulation helps protect the exhaust catalysts and particulate traps found on the latest low emission vehicles. Recommended by a wide range of OEMs, suitable for both the latest low-emissions and older model equipment.