5w30 is not a proper viscosity for most NA ambient conditions, unless it has sufficient HTHS viscosity to serve as an ACEA A3/B3 oil. I doubt youll find one that has a good diesel add pack and sufficient HTHS. Amsoil may, but I think that with the soot loading of these engines, there are better fits that are purpose specific.

Your viscosity chart looks like this:



I would personally run a 15w-40 or 5w-40 oil. Rotella synthetic 5w-40 is a great option that can be had anywhere at a good price point.

__________________
Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1985 190D (169k)
1991 350SD (116k)
1991 350SD (206k)
1991 300D (228k)
2008 ML320 CDI (199k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (267k)

Past Diesels:
1983 300D (228K), 1985 300D (233K), 1993 300D 2.5T (338k), 1993 300SD (291k)