think 91 octane will hurt my car?

[RedemptioN]

i have 99 eclipse gs i just replaced my clutch with an act 2100. and now i really want to get a little more hp. now i normaly run 81 octane but i want to run 91 octane. just want to know if its going to kill my injectors or if my car will be fine. also will it idle diff? so i can kinda know what to look for and not think i broke my car thanks in advance for your input.

 

[eltitillo]

where did you get 81 octane i never heard about it