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Old 10-12-2023, 12:31 PM   #35
James6speed
 
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Drives: '23 LT1 conv, '07 911 Turbo
Join Date: Jun 2018
Location: Lexington, KY
Posts: 44
Revisting this. After I have ran without issue for 10k miles and no knocking on Shell 89 octane, I decided to change to 93 Shell. I have noticed no difference at all in power.. I am switching back to 89 at this point. The internet keyboard pounders we're wrong as I suspected. The computer does automatically draw back with DFI to adjust for the octane and the power difference seems to be negligable. I daily this car, so an extra $20 bucks in my pocket for nothing is good enough for me.
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