Originally Posted by Will_w202

Directly from the Mobil website:

http://www.mobil.com/USA-English/Lubes/PDS/GLXXENPVLMOMobil1_ESP_Formula_M_5W-40.asp



Product Description

Mobil 1 ESP Formula M 5W-40 is an advanced performance synthetic engine oil designed to provide exceptional cleaning power, wear protection and overall performance. Mobil 1 ESP Formula M 5W-40 is engineered to help prolong the life and maintain the efficiency of Car Emission Reduction Systems in both diesel and gasoline powered automobiles that require an oil that is approved against Daimler Chrysler's MB 229.51 specification.


Features and Benefits

Mobil 1 ESP Formula M 5W-40 is made with a proprietary blend of high performance components formulated to be fully compatible with the latest Diesel Particulate Filters (DPF's) and Gasoline Catalytic Converters (CAT's). Mobil 1 ESP Formula M 5W-40 has been designed to deliver outstanding overall performance and protection.

From what I am reading, one can deduce this new oil was SPECIFICALLY created for use in the BlueTec diesels. I'm reverting to dealer oil-changes, and maybe every 7500 instead of 5k.