As far as I know all 370Z have long life coolant (blue color) which doesn't need a flush for up to 60k miles or so. As far as the Gasoline injector flush & Engine oil additive, it really isn't needed as long as you use decent gas and decent oil. Everything else though is standard and it doesn't include differential flush.
BTW I work at a Nissan Dealership so I'm not making all this stuff up
