I don't know any of the Syncro "secrets" yet either!  But do know this:
Same size, tread, and wear for all 5 tires.
Rotate tires at least every 5k miles.
No tight turns on pavement.
Don't drive in mud deeper than the Syncro's wheels (from experience).
Don' drive off road in questionable conditions alone (again, from experience).
There aren't many Syncros out there.
That's all for now.
Now share what you know!
-Loretta
87 Syncro GL (Alaska Bound 6-29)
90 GL