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12-26-2012
I have a 2004 GTP Comp g and have burned regular 87 octane for 9 1/2 years and 190,000 miles. Every once in a while if I feel like racing a round a little I'll put in premium. With the 87 I can here the knock if I get on it at low rpm's and then I just back off. If this is bad for my engine I have yet to notice!!
12-26-2012
its not the knock you hear thats scary, its the knock retard that you dont hears thats the worrisome part.
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