Doc don't you read those signs at the gas station not to use your cell phone at the pump?

Like Dizuster said - no it won't advance extra. If you run 91 you will get full advance most of the time. The factory tunes on these cars are a little bit aggressive, so they will occasionally knock and pull a little timing, especially if you lug the engine on the highway, but not often enough to become a long term correction (unless something is wrong). On one WOT run with 91 it might sense knock, pull 2 degrees for .5 seconds, 1 degree for another .5 seconds, and get back to 0. With 93 it may not do that. But whatever the factory has dialed in as optimal advance is the most it will run, even if you put 110 in it. It will knock sometimes with 91 in it, and probably even with 93 but not as often.

You sure have alot of octane options down there in Florida!