Scheduled for my first oil change @6000K this weekend. Thinking of going with the recommended synthetic (Mobil 1). The service department says its a new thing for Nissan so they weren't much help with info as to benifits etc. Everything I have read says the extra cost is worth it in the long run. Is it true that you should stick with Dino oil for the first 10000K to ensure a proper "breaking in" of the engine? Any thoughts/comments appreciated.