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Old 08-05-2008, 11:51 AM   #12
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Join Date: Jun 2005
Location: Surf City, NC
Posts: 1,079
I've never put in anything but 93, but as others said some 91 won't hurt - especially in highway cruise mode. With knock sensors there is little chance of ping or pre-detonation anyway.

I've also come to fear that with high gas prices some cheaper gasoline companies are cutting additives to offer lower prices. Check out this website for Top Tier brands.
04 Boxster S - Basalt/Savanna, 6sp, Carrera lites, hardtop
70 914-6 - Black over tan, original/stock
PCA since 1970
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