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My '87 n/a ran fine on 87 octane even with the FRWilk chip. FRWilk actually stated start out on 93, then progressively work your way down to 87...obviously keep a keen ear to see if any pinging develops. I never had problems.
Personally i think unless you have an '88 or '89 8v n/a car which had slightly higher compression, using anything but regular unleaded is a waste of money.
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Jon
1988 Granite Green 911 3.4L
2005 Arctic Silver 996 GT3
Past worth mentioning - 1987 924S, 1987 944, 1988 944T with 5.7L LS1
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