Just an update on the Acetone thread. I went through my first 3/4 tankfull of "city driving" with acetone added ... and my measurements show a slight decrease in fuel economy :-(. It was slighty worse than any other tankfull of city-driving gas that I have recorded. On tanking up this time I have again added acetone, but a bit less than before ... about 1 1/4 Oz. per 10 gallons of gas. We'll see how that does.
I look forward to seeing what results I get on my next 400 Km highway trip ... which will be on the weekend of Nov. 6.
-RS-