In early 2005 when the only SL GF-3 that listed MS6395 was Mobil Drive Clean 5 & 10W-30. Well trying to figure out what oil I could run I asked Chrysler and they sent me the specs and after comparing them to GF-4 (just coming out at the time) it was line for line the GF-4 spec. That was at least through M & N versions. Now their apparently a MS6395Q spec which I have not looked up but seen on spec sheet for FormulaShell. Suspect just the addition of 5W-20 for some of their engines.
Basically 5W-20, 5w30 and 10W-30 GF-4 and be done with it.
