Occasionally AMSOIL puts out tech bulletins. I'll will try and post those that may have something to do with the diesel crowd. There are a couple I will go back and find(dated), including this one, that still has good info.

Differential Oil Change alter initial Break-in

 

Very good information. Thanks for posting it. A lot of people have questions regarding diff maintenance and the fluids to use. This addresses many of the questions and discussions with real information. I just changed my diff to the Amsoil 75w140, a very noticable difference. The break-in fluid was pretty funky, but not a lot of residual metals.