I believe thunderstruck is AWESTRUCK TMI. Or he was being sarcastic? Its far easier to be a smart than SMART. No insult intended or implied. This is interesting stuff but its beyond my education or lack there of.
I thought anything more flamable would be more likley to detonate/lower octane? Or is that vapor point?
Is this actually cost effective for milage and power?

I havent evaluated cost vs power /milege. in a controlled Proper accounting format.
only the factors that it does in fact improve MPG
and Power -Response in several given engines and cars.

Opinion statement - "It seems to more than offset the price difference from 93-89 octane in NY this last year and perform better overall than just 93 Sunoco." **

**these statements are the sole opinion of the writer

all depends on how cheap you get your "Tone" man!

Hemigreg I find mostly the same. On my FI 89 Honda accord still getting 2 mpg more with acetone. On the 77 chrysler lebaron I'm getting almost 8 mpg more 5 mpg on average. TQ and lean burn intact. Also as noted I have gone down from running 93 to running 89 octane no ping audible. These are city driven calculations.

As far as how much I use I am using alot less then 20% but i have started to just measure by eye and go with that. I am very happy with the results.

I have been running 3 tanks with. 3 tanks with out and can see a notciable differance first fill up on the switch.

Only vehicle it hasn't worked on is the wife's 99 astro van awd. Ran 4 tanks with acetone on the way back from Miami Fl. and did not see any noticable differnace. Dunno why but I blame GM.


wp

My "average Joe mechanic" experiment is complete.

The daily-driven vehicles under my care are:
1994 Ford Taurus 3.0L V6
1995 Chrysler Town & Country 3.8L V6 AWD

I used Sheetz "Regular Unleaded" gasoline throughout the experiment, as that is what I've been using for over a year now, and I didn't want to introduce any new variables. I performed the experiment for about two months. The average MPG of the above vehicles did not change; no improvement nor degradation of fuel economy was noted. My wife (who drives the van) didn't even realize that I was adding the acetone! The only difference I observed was that the Taurus motor seemed to idle a little smoother. Even before reading this latest series of posts, I realized that with continued usage, the acetone must have cleaned some deposits in the fuel-delivery system. But overall, this was not enough to justify the cost. I discontinued adding the acetone about two weeks ago.

I think the results will vary wildly, depending on who you ask. There are too many variables to say that ONE additive will be the cure-all in all situations. Quality of gasoline presently used, compression ratios, fuel atomization, spark plugs, operating temperature, driving conditions, atmospheric conditions, quench, etc. The list goes on and on!! Therefore, I think adding acetone will neither help nor hurt the performance in MOST cars. I think adding it will hurt some cars, and it will help some cars. The typical "bell curve".

I think you broke it down to simple english when you said it broke the surface tension of the gas, allowing it entrain O2, thereby getting a more complete combustion.

I been using it fairly regularly for a couple months now.I've noticed if I don't remember to add it when I get home from filling up and go without for a couple days; the gas gauge goes down alot quicker. Haven't actually done any calculations, but I know it makes a difference.

Actually tested this in a semi controlled environment.
2002 VW Jetta. 4 holer. 23K miles.
DTW (Detroit Metro Airport) to ORD (Chicago O'Hare).
Without 27.4 mpg.
With 29.3 MPG.
New Plugs, Oil, Oil and air filters before 1st trip/test.
Same car, same miles, same driver, same load, even real close to the same temp out, there and back.
1.9 mpg increase.
Mixture: 1 oz to 6 gallons.
Terry Bogusz
GSE Manager
Spitit Airlines
Detroit Metro Airport

Cool inputs thanks guys for the real world inputs

amazing isnt it? this post is immortal. being the author of acetone in da gas. i never imagined this would go on for so long well i have been useing it since last september 2 ounces up to6 ounces per 10 gallons of gas and thats many many tanks in that amount of time and yes it does seem to make the engine run smmother at idle. but i have never had an increase in mpg. even in a couple of road trips rangeing from 500 to 1000 mile trips. but my fuel system and carb is still new and clean. well it's a year and1/2 old. this has been my expierence with ass a tone in da gas. oh yeah do you all like the new challenger that was at the car show??? wisht i had one

I tryed it on my 1995 Ford Mondeo 2.0 station wagen with a 2.0liter Zetec engine and 5spd.
MGF just went down very little, probably was more measuring tolerances than real gain. But I felt (maybe it was just a feeling?!) that the engine is stronger and revs quicker. A friend with the same car did the same, he also didn't gain mpg but also felt more power when accelerating hard.
So I don't really know if I should continue with that, but surely will try it this summer with my 440...

I used 6oz in each 20 gal fillup in my Explorer for a several months last year and saw: a) an increase of 2-3 mpg, b) an elimination of ping, and c) more 'seat of the pants' power. Then my can of acetone ran out and I ran about 5 tanks of regular unleaded. The 'ping' has not returned, but my mpg has significantly dropped, and the 'pep' is not in the motor now. I'm picking up another can next time I'm at the hardware store.

Ok I found it! I guess it is time to reread all these pages. I bought a measuring cup and a gallon.

HUH?

industrial grade (HPLC)acetone is pretty expessive! ($20/gal w/ company discount)...curious if you have tried acetonitrile??? Interesting work so far!

the home depo stuff is good enough for most cars.

Has anyone tried this at the strip. IE: with acetone and without to compare ETs or on a dyno to quantify HP increases? Just curious.