Here's the scenario:
You live in an area of the country where the Z isn't going to see road time in the near future due to salt, snow, dirt, potholes, etc.
Here's the question:
Do you put in on the tender, put some fuel preservative in it, and leave it for spring?
Do you put in on the tender, do the fuel preservative and start it once a month and let it run for till it gets up to temp?
Do you do nothing?