Same filter as a VQ35, I'm using a Nismo filter (http://www.gccorp.com.au/automotive/product_info.php?cPath=54_57&products_id=145). I think most people would recommend any other filter than Ryco. Nissan genuine filter has also been recommended to me. Part number I have here is Z445.
15W40 is ideal, although I think I'm using 10W50 at the moment, and no issues whatsoever. There are a few oils around that people like, Motul 300V seems to be the easiest to get (and dearest). I'm using Valvoline Synpower at the moment, and again no issues so far although its only been in the car 3-4 weeks.