One tank of standard grade probably won't give you issues.
My 1994 Acura Integra GS-R requries minimum 91 octane premium. If I were to use standard grade gas, the sensors in the engine would detect it, and moderate the valve timing, reducing performance but allowing the use of standard grade fuel. In high compression ratio engines (I believe mine is 10:1 or so), high octane is needed for the engine to perform at its best and to avoid spark knock. Fortunately, in Michigan we are allowed to pump our own gas (my understanding is that you are not). Best bet next time is to complain immediately to the gas station where you were fueled at.
Adding octane through a can of booster is certainly an option in this case, but just one tank of gas shouldn't cause long term damage to your car.
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