I'm on the edge of pulling the trigger with the EFI live tuning device. However, before I do I'm trying to get a better idea of what is possible with the different kinds of tunes. I was hoping to have something like Stock, 87 Eco, 89 Power and 93 Power. The octanes I've chosen seem to be most common in my area and I do not want to have to be changing tunes constantly. So it's is why I'm curious to see if an 89 tune is even possible or worth it as I use my car for a daily driver and I would prefer to not have to shell out the extra .30 - .40 per gallon for the top tier stuff. I'm also not looking to shred any tires, just want some extra confidence when passing the slow pokes on a two lane road

I emailed Jerry directly last week, but haven't heard anything back. Perhaps I should send a question to the customer support email. If anyone here can shed some light on this for me I would appreciate it.