Can you run other octanes? Yes, but I would not advise it. Each tune is setup to run with an octane level for good reasons and running a lower octane level with a higher octane tune can cause damage to the motor.

 

Thanks for all the info and sadley I normally run 87 so I guess thatell be the tune for the fuel 87 performance or race tune. I could not belive the diffrence my car origninally came with a tune with the cai but come inspection time I had a corrupt file and they had to flash my computer so no more tune or cai such a diffrence