Several weeks ago I got some advice on using acetone here on the Forum... Well I decided to try it and I can attest to the fact that it does work!
I buy the acetone at Dollar General for (go figure) $1.00 @10oz bottle.
I use 7-8oz on 20-22gal and I've used it on 4 tankfuls so far and I went from 15-18 mpg city/highway to 17-21 mpg city/highway/
The last 4 tankfuls I average out to 20.2 gals @ fill-up.
This last tank was 98% highway driving.
The last tank was 20.8 gals @ $1.94 @ gal (here at a local supermarket chain called HEB here in Marble Falls Tx)
Conservatively, that's .4 cents added per gallon of gas cost-wise (someone please check my math).
I do see a more responsiveness... takes off a 'lil faster. On the high end, when going about 60mph and I really goose it, the surge and pop is incredibly higher than before I started using the acetone.
Let me know what y'all think... VROOOOOM!! ZOOOM!!