So the numbers are finally in guys. I took my 386 mile trip from NY to Cleveland ohio this past weekend and here are the results. On my trip to Cleveland Ohio I used no Acetone in the tank and my trip was clocked at 386 miles with 35 miles left in my gas tank. According to the figures i should be able to do 421 miles on one full tank with no acetone divide that figure by a 14.5 gallon tank (which is all i could fill it up to) and you get 29.03 MPG, which is not bad at all considering what a beast our cars are stock ;-). Finally I drove back adding a little over 1/3 cups of acetone to my gas tank. The result was 386 miles driven and 50 miles left in the tank. According to this I should have been able to drive 436 miles which is only 15 miles more then without acetone, and my MPG were 30.07. I tried to control the conditions of the test as much as possible as in putting the car in cruise control at 73MPH (got a ticket last month for driving 85 MPH on the highway, damn you NY police!!), the weather conditions were the same as well, but beyond that I really couldn't do much more to keep my conditions the same( im not god so i can't control the wind patterns :-) ). Looks like my experiment shows that acetone doesn't increase MPG in a 2006 MKV GTI drastically, this doesn't mean that every 2006 MKV GTI will get the same results as mine since every car is a little different. I have heard that acetone will help keep your engine clean, like the octane booster stuff that you can buy at autozone, but I don't know if that's true that's a whole other experiment (which someone should do). I must say with or without acetone I'm a happy camper getting 29-30 MPG highway and around 24-25 city, especially now with gas prices being INSANE. I would like to know your opinion on this. What do you think I could have done differently during this experiment or what do you think of the figures.