You can use any diesel rated (CX) oil without HARMING the engine. The universal grades such as CH4, however, are blended SPECIFICALLY for use in diesel engines. These oils have additional detergents and soot dispersal additives to deal with problems specific to diesel engines. There is no reason to use anything except universal grades.
I use Chevron Delo 400 in everything I own except my new C Class in which I'm sticking with the factory synthetic. The additional additives help my gas engines, everything from pickup to lawn mowers, stay clean as a whistle inside.