So I decided to share the log book I use. I usually just use a simple excel file to keep track of cost, maintenance and work that has been done on my cars along with the gas fill ups (just for my own stats).
This can be used for any car really, but the information that's posted in the Periodic Maintenance and Fluid Capacities tabs only really applies to a 370Z. But feel free to change any of that information as needed.
I also created two versions, one is in imperial units and the other one in metric. Just to make things easier for people depending on where they live.
The link will be up for 30 days (since it's a free file host), but you can share it anywhere you like. I hope this helps some people.
Here's the link:
https://ufile.io/f/fc6ss