Originally Posted by Limeybastard

... and nothing to do with whats best or what not.

Recent research has concluded that the EU / UK service manuals state a 9000 mile oil change interval. Why does the current US spec 370z state 5K miles?

I am sure the oil over there is the same as here.

I am also aware that US Nissan changed the oil changed service interval on the 2013 + books to 5K from I think 7K.