8th Generation Honda Civic Forum - View Single Post - SI with 87 octane gas *Threads merged*
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Old 09-26-2008, 01:57 PM   #96 (permalink)
bsbabcock
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Join Date: Apr 2008
Posts: 726
Indeed.. similar answer I got. Stated to me by one guy that typically if anything was not as marked, it would be premium fuel in the regular tank.. erring on the side of better octane. However, I'd hate to inadvertently put 93 in a big $10k Toro mower designed for regular. Heard 1st hand that will kill one quick.
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