The obvious thing with a 2007 is the bulging bonnet, 2006 and before don't have it.

This might help a bit:
https://my350z.com/forum/2003-2008-n...questions.html

Very few questions that haven't come up over the last 6 years. Don't forget to use the "search" button.

 

ive got a 08 z with new motor in it hr fastest 350s made
asking 22k its 08 blkblk 5k miles

 

06 6mt, 18000 on the odo, beginning at 1500mi, used mobil1 full sythetic once, then at 2000mi, changed to valvoline full synthetic at 2000mi intervals. My 350Z has never consumed/used any oil or had signs of burning/consuming. I guess I lucked out some. I check the dipstick every 1000mi or so and its going to be a hit or miss for you. Of about 100 350Z owners I know less than 5 I know had this oil consumption problem with their 350z. Full synthetic is good for more miles between change intervals than what I have chosen.

 

Unfortunatley you will have to own the car for a little while before you will know if you have a OC problem.I have a 06 and what I do is check the oil about a 1000 miles after the oil is changed.When you check it if the oil level is not full then you probabley have a OC problem.