I doubt they meant 89 octane. Pretty sure it's going to require "premium" with 12.5:1 cr.
As for 100 octane - woohoo! Agoura Hills is close enough - but, what the heck am I supposed to do with 100 octane?!

. (best bet would be for me to mix it down at the pump w 91 octane... too much hassle, though my WRX would pick up a few ponies)