8th Generation Honda Civic Forum - View Single Post - SI with 87 octane gas *Threads merged*
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Old 09-23-2008, 09:04 AM   #67 (permalink)
w00t692
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Join Date: Jun 2008
Location: Louisiana
Age: 26
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Stephen
^^ he's correct. This car requires 91+ octane through compression alone. Timing is another thing they tweak to require higher or lower octane ratings (thus boosting power) But you can't really tweak this as much at 11:1. But there are 10:1 and stuff inbetween 10:1 and 11:1 that requires 91+ octane because the timing is advanced pretty far from the factory.

Don't put 87 octane in your car ever. If you have to, drive it like a baby, and don't put a full tank ever. Fill it up with small amounts like 1-2 gallons.
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