Yes mate.
Are you local?
What exhaust have you got on your Z as it sounds very nice.
If your local there is a meet on bank holiday monday 6th may, come drive to cheddar then a visit to mendip race track.
I'm Dave by the way.
Tyre replacement indicator. I think its worked out on mileage done by your tyres. You can set or reset this in you trip computer.
Go to sub menu Maintenance. On there you can set distance reminders to change oil filter/ oil/ tyres.
Hope this helps.