hp gain or not, what you will notice is an engine knock if you lug it at all with the lower grade in it (atleast with a manual trans it does). that will disappear with the higher octane. it will run on either though. (funny fyi~the tl reacts exactly the same, lower grade, lug engine in the tiniest bit, knock. higher octane eliminates it. i believe our local acura dealer even said they put regular gas in all of their loaners and demo casrs..... so much for "requiring" the 92....)
