Quote:
Originally Posted by sgdude  i have a question:
i have a 97 GTP, bought it 14 months ago, always ran it on 86 octane (in NM regular is 86, not 87), never encountered problems, such as knocking. i recently filled up on premium 91 octane (ive used 4 gallons so far, i burn a gallon a day) i see no difference. so is it really important? |
How do you know it wasn't knocking?
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2004 Impala LS - got some mods
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