At the risk of entering the fray with a modicum of sanity, which is in high demand at our house, I quote my former boss at the engineering test lab. Make your observations and record them in plain English and great detail. That way someone else can verify the experiment. The general use of fuel blending beginning with "Motor Fuels" by Leslie (1929) has been to increase power output by increasing compression ratio. Racing engines and piston aircraft are the most notable applications. One can do amazing things under the lawful conditions. To get a 20% increase in fuel efficiency typically one either has corrected a gross defect or doubled the compression ratio.
Now if anyone cares to learn, I can teach you to toast a marshmallow over a hot wood coal while holding it between your fingers without getting burned. It does take awhile.
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