Tag and Gooch, carrying around additive is bringing back some memories of the 63 chevy i drove around in high school. :) i was really trying to not have to carry that shit around in my hatch, so i just switched my software down to 91 octane for now...
It's pretty simple. There are 4 programs available. Stock, 91, 93, and 100. You can toggle between them with a sequence on the cruise control buttons when your car is in accessory mode.
Move to New Jersey lol we have 87, 89, 91 and 93 at every gas station, plus I know where to get 100 octane too