im new need info

[snowmn313]

hi im brand new to this so little to no knowledge but i just bought the intune i2 for my charger and currently has 87 octane in it
i plan on filling it with 91 or 93 octane as soon as i can but my question is
what would happen if i tuned it for 93 right now with the 87 octane in it would it harm anything or should i wait until i fill it with the 93 to tune it to 93

[mikel]

you should wait...even with the stock tune on 87 its likely knocking like crazy and down 10-15 rwhp over where it should be with 91/93.

Thanks