just my two cents worth.
Personally I'd check with a mechanic you trust before using an over the counter injector cleaner. Over the counter injector cleaners have been know to cause injector damage. If you have a mechanic you trust I'd recommend having them clean your injectors or at least pull them and inspect them.
I agree that the higher octane fuels do not have any more detergent in them then the lower octane and one tank ever now and then is not going to help reduce build up.
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