If you mixed 50/50 100 octane and 91 octane it should yield 95.5 octane, but donīt think that is enough of an octane boost to get you much. Plus, you probably have to run it for a while before the engine readjusts to that fuel, I donīt think is a matter of a few minutes. In any event, you results are consistent with what PG has gotten and we should easily be able to extract 535bhp or so. Not too shabby in my book. lol!! Congrats.
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