Fuel mileage mods and alternative fuels

Ok, here's a fairly simple additive that has worked in my wife's 95 Lebaron Convertible:
2 ounces of acetone to 10 gallons of gas. I tracked it carefully for several months and mileage will go from 23.5 to 25+ mpg in mixed driving. 87 octane 3.0 V6 auto with 205,000 miles.

I'm not guaranteeing anything, do your own research, but I am saving a gallon of gas every ten with just this and the acetone is about $15/gallon at W-mart or less than $.30/ 10 gallons. At $4.20 a gallon, that save me $3.90 a tank/week x 52 weeks = $200/year.

If 25% of the population did that we would save an incredible amount!

found a site with info:
http://www.pureenergysystems.com/news/2005/03/17/6900069_Acetone/