Shell Rotella® T diesel engine 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. The exclusive low ash formulation helps protect the exhaust catalysts and particulate filters found on the latest low emission vehicles. Suitable for virtually all low-emission heavy-duty diesel engines. Provides significantly improved wear protection, deposit control and resistance to breakdown under high temperatures.