The lower octane will not hurt it for short term use. The knock sensor will activate. Just don't push the throttle. But with all due respect, That 104 crap is......well crap. It states it will raise the octane level by 2-3 points. Those points are actually .2 to .4 octane points, only tenths, that what points are, not whole numbers. There may be other additives that can suffice, but READ the label and be a sceptic.
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