Hello all. I just spent the better part of my retirement savings on an 06 Mercedes with the old 5 liter 3 valve V8. I understand Mercedes recommends Mobil 1 0w-40 for use in this motor. (I haven't got the owner's manual yet as the car won't be delivered until next Friday the 19th). Were there any oil related issues with this motor? (ie sludge) From what I have gathered, this was a fairly trouble-free design. I intend to go 10-13k miles between changes. On another note, is Agip oil available in the US? Any opinions? Thanks