As usual, this is just one of probably a dozen or so threads about what grade of gasoline should be used in a Crossfire, and there always seems to be somebody who doesn't feel it's necessary to use a premium grade fuel in their car simply because they don't notice any difference in its performance when they do.
That being said, and with this being a rather friendly forum where everybody is usually more than willing to help out another Crossfire owner, I'd like to make a suggestion.
Go ahead and run what ever fuel that you want to run in your car. If it seems to be working out for you, then congratulations. Just do us (on the forum) a favor by writing #87 on the back page of your owners manual, or some place under the hood. That way anybody (here on the forum) will know what kind of fuel was used in the Crossfire that they may be considering on purchasing in the future when it winds up on some dealers "used" car lot. Then we can choose to pass on it and look for another one.
It will be "our" little secret, sort of like a secret hand shake kind of thing.