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Alternatively, you could move to europe, where it's difficult to find 87(r+m/2) fuel, or Germany, where most stations don't even sell less than 90(r+m/2) anymore.
I'm bumping this to link to
https://hondaswap.com/reference-materials/us-octane-vs-other-countries-octane-ratings-59435/
as these numbers are in-correct.