CR-Z 2012 storm silver
Sounds like a really good idea, too all of the above. 👍🏻 It will maybe even help you gas economy . Since it has never been done before.Ordered plugs and valve cover gasket. I am at 166k miles. As far as I know, original plugs and no valve adjustment ever done. I have not done it. I may go after the coolant also since I have no idea when it was changed either.
Remember to do a reset and idle learn. When done.