1. Ans: Many members here did their oil change after the break in (at 1200 miles). i did mine about 2000ish miles. Nissan want you to do it at 3750 miles. All three intervals are acceptable.
2. There's no need to hit the redline now. Once you have passed 1200 miles, you can redline all day. I remember the moment I hit 1100 miles, I redlined all the way to 7500 RPM (yes, I know. I couldn't wait till 1200 miles. I only did 1100 miles break in
)
3. 100% normal. We all have it in all our Z models.
Of course few may not agree with the oil change or break in post, but this is my input.