You can never ask too many questions
. Overall, I have no idea what input variables were changing when the acetone was added.
At the end of the day though.. even if the increase was consistent, I don't think it's worth the time and money to add acetone to the gas tank. If it was a 10% or higher increase, I'd be more interested to do further testing. Unfortunately right now, I've been without a ScanGauge for 6 months now (and my gaslogs show it).