91 tuned running 94 ok?

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Just bought a 2018 wrx. The guy before me put in the cobb stage 2 package, fmic kit, 20g turbo and cobb flex fuel system. He never unmarried the tune which is a Delicious 91 tune. Problem is the town I live in has no 91 or ethanol. Only 89 and 94. So is it ok to run 94 or higher? Thanks.
 
If you are asking the octane to run, then yes 94 is fine, but that is really high. Depending on altitude, you may be running 90, because that is all you can find.
Octane is resistance to detonation, nothing more. Corn squeezins have a higher octane, but few are tuned to the stuff, and you really don't get both.
 

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