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Edit: looks like you meant 91 to 93. Disregard most of this comment. Except that octane boosters are shady.
Wait, you got 63 octane somewhere? And you put it in your car?
Generally, octane boosters are mostly snake oil. They usually only increase you effective octane rating by 1 or less points. The "points" advertised on the bottle are usually multiplied by 10 or 100 (so 40 points=0.4 octane improvement or 5=0.5). It's all really shady business.
If you really did put gas that bad in your car. You should drain the tank. The only other option is finding some high octane race gas and trying to mix it to a reasonable rating.
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