Do you change the pulley or just the tune?I just do it for a piece of mind. I've always stored it with 91 non oxygenated fuel. I'm sure it would be fine with e85.
This is basically the only time my car gets a tank of 91. But I may run it longer as I have another 340 city miles of clutch break in.
I've also heard running 91-93 periodically isn't a bad idea. However, I'll never go into boost on it anymore.
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