So I guess the old thread on this is closed. I was very dubious about using acetone to increase my mpg but my initial results were positive. 2000 Dakota 3.9L with a 22gal tank. I added a little over 2oz. per 10 gallons and my mpg went up 7.5% this first run, and that is basing my calculations on my highest avgerage mpg. I generally average 19mpg but sometimes I may see 20mpg so I went with the higher. Same trip, same ballpark mph with cruise set as much as possible. The acetone addition gave me 21.5mpg. I plan on treating another tank at the same level and seeing what happens. If it improves again or stays at 21.5 I plan on not treating the next tank to see what happens.