Shell Rotella® 15W-40 Motor Oil has been formulated to provide Triple Protection technology against wear, deposits and emissions. Shell Rotella® T Triple Protection oils use the latest additive technology to protect under the most severe engine conditions found in modern low emission engines. Designed to provide responsive protection that continuously adapts to your driving conditions resulting in significantly improved deposit control* and significantly improved resistance to breakdown under high temperatures*. The exclusive low ash formulation helps protect the exhaust catalysts and particulate filters found on the latest low emission vehicles. Suitable for virtually all modern low-emission heavy-duty engines.