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B18C Octane requirements


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Sorry I don't know where to find this, but I'm thinking of selling my car and getting a civic hatch and doing a B18C swap. What octane gas do you have to put in (I live in KS, so its not the crappy california stuff that says 91 but drives like 87). I'm talking about one with the 10.6 compression ratio, JDM and USDM spec if you can tell me (if it makes a difference), i'm considering both versions.

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