My only suggestion to you is to grab a ScanGauge, fill the tank completely without any acetone. Get on a dead-calm road and do 2 runs without acetone. After the 2 runs, add the appropriate acetone mixture to your remaining fuel left and do 2 more runs on the same road immediately after the initial part. Record the MPG averages between the first set and second set of runs and see if there's any difference.
I did it with my
acetone revealed video experiment, but I allegedly added 'too much' acetone (as per the dozens of 'you did it wrong' comments left on the video). I'd love to do the experiment again with the 'proper mixture' in my dad's car, but I lost my ScanGauge nearly a year ago.