Originally Posted by
GraphiteGhost

Oh my... Mea Culpa! I screwed up! Great catch MrM, sure wish I could have realized my mistake sooner! I keyed on chturner's post and wasn't thinking. I knew 2 points below was fine and used his 93 octane number... D'oh! Please substitute all MY 93 numbers for 91 numbers, and my 91's to 89's.
Our crossfires are designed for 91 octane! I use 89 octane all the time with NO discernible performance problems. Its also a good thing on my wallet! I am not going to 'edit' my previous posts as reference to what was said originally. Man, I got to stop and breath sometimes! No excuse for the error BUT I did just get notified I am a first time Granddad as of Friday late, many short sleep cycles since!
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Well congrats on being a Granddad!
I know you won't "kill" a car (even though my Sportster sounded like it was on it's last leg.. LOL) with an 87 octane.. My ex wife has ran it in her LS1 z28 for quite a few years..

.. But I figure that "premium fuel only" sticker is there for a reason.. LOL.