I just did my first oil chage last weekend at 2,600 miles. Probably way too early but I remember when new cars were on a 1,000 mile schedule for the first oil change - I don't think it will hurt anything. I'll now stick to a 5,000 schedule.
They put the oil filter in a less than perfect spot as it drains all over part of the sub frame making a mess.
I only put in 4.5 quarts figuring I'd top off the rest of the 3/8 of a quart it calls for after I ran it for a bit and then check the dipstick. When I went to do that it was right up to the full mark on the dip stick with just the 4.5 quarts so I'm not sure if the dipstick is off or the requirement is wrong - I'm leaving it at the present level as that's where it was before I changed the oil.
I used Pennzoil 0W-20 that I purchased on line from the oil-store.com - cheaper than buying from a local vendoe even with the shipping.
I purchased 10 oil filters and gaskets from nissanparts.com. The filters were 3.99 each with free shipping.
Edit - Sorry, purchased the oil filters from Nissan Parts Online at:
http://www.trademotion.com/partlocat...?siteid=214459
I had to punch in a 2006 Altima to get the parts to list but the filters are the same for both years.