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  1. 85 Octane at high altitudes?

    Performance Modifications
    I am moving from Maryland to Colorado and, of course, taking my 2008 CRV EX 4wd. Their regular grade gasoline in the Denver area is 85 octane (87 is mid-grade). I was told that, with the higher altitude and thinner air, it's not necessary to use 87 octane. Does this hold true with the CRV...