Heck by that reasoning what if the motor method has 1 octane? Then the gas must have 187 octane by the research method, right? It ought to be super-extra-awesome for the high-compression IH gassers!
By that reasoning, 87 octane should be okay because if the motor method says it has 80 octane, it must have 94 by the research method.
It doesn't work that way.
You can't just pull numbers out of your butt and say "what if?"
The research and motor methods come up with pretty close numbers. 8-10 points difference is about all you would ever see.
So 89 octane would have 84 by the motor method and 94 by the research method.
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