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Talk:Directory:Acetone as a Fuel Additive

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Discussion page for Directory:Acetone as a Fuel Additive

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Article:Truth About Acetone and Ethanol - Steve D. Gage gives the logic and data behind his conclusion that vehicle fuel efficiency can be improved 50% by adding 1 oz acetone per gallon and tricking the car's computer into detecting an excess of oxygen so it richens up the mixture. (PESWiki July 19, 2008)


On Acetone as Fuel System Cleaner

From: Paul Baratti- August 12, 2008 11:36 AM

"You can add this to your website if you wish. I have been in the aerospace industry for approximately 28 years and have worked in various capacities in military, civilian R&D and commercial airlines. I am what you could call a shade tree mechanic and I try to use what is practical and what works (sometimes not as well as envisioned) and acetone is one of the less harmful solvents that I have been exposed to, one of the worst being Trichloroethane. Acetone is in fact quite flammable and should be used with caution in that regards although as for the use as an additive I would have to say it is benign to most fuel system components. Jet-A (JP-4) is more harmful to piston engines than that small amount of acetone.

To get to my point, I have used acetone to “clean? fuel systems, even in a 1971 Datsun 240Z that had been sitting in the Arizona desert for 6 years, with wonderful success. As far as a mileage additive I haven’t considered that but as a fuel system cleaner it works very well in removing the “varnish? that develops when gasoline sites even if the vehicle is in use (there is always a minute amount that remains in the tank and fuel bowls in the carbs).

In short (round aboutly) I will try this on my 2004 Chevy Cavalier, and then on my 2001 Rodeo if the Chevy shows improvements and give you updates on both when I get the results."

Paul Baratti

Technical Writer/Editor III

Specialty Engineering Group

This article is dangerous and should be deleted.

Swelling of fuel system components listed as "adverse effects" indicates a chemical reaction and is potentially dangerous.

Commercial products are tested for use in the automotive system wherethey are intended to be used. See the SAE Manual for additional information on fuel and brake systems chemical compatibility.

The SAE Manual is available in engineering libraries at schools across the country.


If you have any question as to Acetone being safe to put in your gas tank, go to the Berrymans Chemtool (a common fuel additive) web site and look at the MSDS (material safety data sheets). Almost all of their products have acetone in them.

All this talk about acetone causing fuel system and engine damage is just nonsence!

Posts Moved Elsewhere

Comments originally posted here, now moved to their own page.

Directory:Acetone:Data:hello world - 88 Ford T-bird 302 mileage increases 18% 2001 Chevy Tahoe increases 6% using 2.5oz acetone per 10 gal fuel. (March 31, 2005)

Directory:Acetone:Data:M.R. - At a ratio of 2.8oz. per 10 gallons of premium gasoline, I have enjoyed a 12mpg increase in efficiency in my Dodge Grand Caravan. Bonneville increased by 10mpg. (April 4, 2005)

Directory:Acetone:Data:Painter Friend - mileage is better. (April 7, 2005)

New Reports

post here

Damages Fuel Injectors and Fuel Pumps

As a former mechanic I found this experiment to be of great interest. I was unfortunately a victim to the early testimony here that said acetone does not harm engine parts. I added acetone as recommended to both my 1996 Honda Accord wagon and saw increased miles right away. I also put it in my 1997 Dodge Ram 1500. After several tanks in my truck (and a little better mileage) I found my number 1 injector showed up as failing. Shortly after that I was talking to John Bedini about the better mileage I was getting and then he said, "yeah, but it will kill your injectors." Then I laughed and told him this just happened to me. So this weekend I went up to the cottage and my Honda would not start again. Had to tow it home 100 miles and go home early. Turns out my fuel pump was gone. The mechanic asked me, have you used injector cleaner in your car? I told him about the Acetone. He said, Honda pumps never go unless you damage them like this. So I conclude that this added mileage is certainly not worth the damage it causes. And I suspect that we only read the initial reports here and not the long haul uses of acetone. Be warned. Rick Friedrich


I have recently started my personal test of the acetone additive. I drive a 96 Ford aspire approx. 124 miles round trip to work, 4-5 times per week. I drive this car less than 10 mile per tank outside this work commute. 64 miles of the commute is at 55 mph and 64 miles is at 65 mph. I did nine tanks of fuel without acetone all from the same station and got an average of 28.164 mpg from 1/5/07 to 2/9/07. I then started adding 2 oz of acetone per 10 gal of fuel for the last 8 tanks, all from the same station, and got an average 30.633 mpg from 2/9/07 to 3/4/07. That is an 8.76% increase if my math is right. My next step is to increase the dose to 2.5 oz per 10 gal of fuel. The outside temp. in my area has been consistant with an average of 25 degree F. I have tried my best to reduce most of the veriables with my test because I wanted accurate results.

Good evening, I posted my initial findings of using acetone in my 2004 Honda Pilot a few weeks ago. I have two updates to report. My initial findings was an increase of 20%. I let my tank go to half a tank and refilled it with nearly 10 gallons of regular gas (9.7 gal) and added the same amount of acetone (3 oz ) and ran it down to half a tank again. This time my mileage actually dropped from the vehicles normal 20 mpg (mixed driving) to 18.9 mpg. This got me thinking why the big decrease from a high of 25 mpg using the same amount? When I refilled the tank again (I fill all the way up the neck so there is no mistake in my measurements) I did not add any acetone. This time my mileage averaged out to 23.8 mpg. My conclusion is that my Honda is very sensitive to the amount of acetone it really needs. Also has anyone addressed acetone accumalation in the tank? By that I mean how does the other half of my 20 gal tank react to mixing fresh acetone at the half tank mark. If that gas is already treated by the initial 6 oz I put in it in the beginning (tank was almost empty) adding another 3 oz's at the half tank mark may be over doing it. Any thoughts on accumulative acetone? After all, I don't know many people who will run their tank close to empty on a routine basis. I am now testing a half tank at 1.5 oz added to see if I can fing the ideal mixture for my Honda. I feel safe in saying my 20% mileage increase at the beginning was accurate but it has been hard to repeat so far. 15% is probably more realistic at this time. Bye the way, I am hooked on acetone and even if I can't get my mixture right I know it has already saved me money. More to come,



Acetone report for 1991 Ford Explorer:

4.0 L 4wd

168K miles

Average Highway MPG before acetone - 17.1 MPG

Using 3 oz/10 gallons of gas - MPG reduction of 23%

Using 1.75 oz/10 gallons of gas - MPG increase of 11.1%

At least 335 miles were driven for each test.

One further test was 'aborted' because I forgot to bring more acetone with me. However, my guess is that there was about 2.25 oz/10 gallons and the MPG increased about 21%. This must be taken with a grain of salt since I don't know the exact amount of acetone used - driving conditions were not particularly comparable as well.


I tried this with my Opel Vectra (1.6, 1997), about 1500 km (a thousand miles)

both with and without acetone (15ml / 10 l). There was roughly a 5% _decrease_

in the MPG, i.e. the fuel consumption was on the average 7.76 litres/100km

with acetone and 7.42 litres/100km without it. Driving conditions were

about the same.


General Comments

Trying it in my motorcycle

After reading about acetone I was thinking of trying it in my motorcycle, but I have a concern(_), would it affect the plastic fuel filter ? the gas tank interior? the gaskets?

How about letting the acetone evaporate and mix with intake air instead of putting it in the gas tank with gasoline? wouldn't that be less harmful to the carburetor or injection systems?rubber and plastic components.I think if acetone is mixed with air before mixing with gasoline the combustion will be more complete but would the acetone have a chance to loosen up the gasoline molecules as well as if it was mixed in the liquid form?



High Mileage

Acetone is an absolute boon to high mileage cars! I am wondering at this moment how much it affects the octane rating as well.

I am half tempted to copy Kruppa's plug design for use in my own vehicles!

Acetone appears to benefit a wide variety of automobiles....but it really shines in those cars with higher mileage with a greater disparity of performance from when they were once new to their current, aged conditions. I am certain that the increased vigor of combustion is helping to compensate for worn rings and other losses commensurate with age.



Reproachably unscientific supposition

I was certainly at a loss in grappling with Sterling's data!

Then I thought....what am I missing here....why do others have such great results and his actually slightly worse than his control.

Could there be anything to the glass half full and glass half empty philosophy that might possibly translate to physical effects?

Granted, we are talking about Acetone here, not water.

Yet....what IF....what if our solar system is passing through a strand of altered matter/ where now, at this increasingly critical juncture of humanity, one's faith is force coupled with greater energy.

As you believe, so let it occur unto you.

Dr. Emoto seems to have obtained interesting results with water...

Or maybe I am striking an 'acetone' here. (sad pun half heartedly intended)

(insert Rod Serling theme here)



maintaining a ratio

maintaining a ratio

...determine the avg amount of gas you typically add at each fill up...calculate the amount of acetone needed to keep the ratio you want to maintain....over time the ratio will likely remain about the same....


4 oz acetone per 10 gallons ratio:

1 gallon = 128 fluid ounces

10 gallons X 128 = 1280 fluid ounces

1280 oz / 4 oz = 320

resulting in a ratio of 1 part acetone to 320 parts gasoline.

With a 10 gallon tank with 4 oz acetone that is refilled after using 8 gallons (4/5s tank used)...and no additional acetone end up with a tank with .8 oz of acetone still in it.

1/5 of 4 oz = .8 oz acetone left in the 10 gallon tank

So with the next tank, you would only need to add 3.2 oz keep the 4 oz per 10 gallon ratio.

So if you typically refill at this level...this is how you would maintain the 1 to 320 ratio.

Dr Do........little

Honda odyssey 2000

make & model of car - Honda odyssey 2000

ratio(s) of acetone used (oz / 10 gal) - 2 oz/10 gal

mileage before - consistent 385 (Kilometers)

mileage after - 455 Kilometers

number of kilometers tested - thus far 1600

other observations (power, idle, exhaust) - the 3.5 V-6 engine feels much tighter, more power and smoother with Acetone.

I'm driving a honda odyssey 2000 with 170000KM on it. Noticed engine is running smoother and slight increase in performance when using acetone. I am adding 2 onces per 40 liters of gas. I was getting 10.4 liters of gas per 100 KM with city driving, mileage increased to average of 8.8 liters of gas per 100 KM and for highway driving it went from 8.8 liters per 100KM to 8.1 litres of gas per 100KM. Contrarily to what I have read, engine knocking increased using 87 octane which I always used. Increased octane level to 91 and knocking disappeared and mileage has increased, too early to post.

Questions and observations, first, always changed my spark plugs for 25 years, I was shock to see how clean it was after using acetone, what would explain this... the metal part is clean and the white porcelain is white and this is after doing 15000 KM on the plug (NGK). Second when I first start the engine, it smell more than usual but has soon as it warms up, two minutes, it doesn't smell anymore, concerns. I will stop using acetone for a while to see engine response, check knocking and smell. I haven't use acetone for too long ( two months ) and once every tanks I alternate between gas and gas with acetone.

With 40 liters of gas:

City driving before acetone average 380 KM to 390 KM

Highway driving before acetone average 450 KM to 460 KM

now with acetone,

City driving average 450 KM to 460 KM therefore, I do between 60 to 80 more kilometers.

Highway driving average 490 KM to 500 KM means I do between 30 to 50 more kilometers.

Regards, Pascal,


I tried this thing with my 1997 Opel Vectra (1.6).

I drove about thousand miles (1500-1600kilometers)

both with and without acetone (15ml / 10l). There

was a small _decrese_ in MPG: the fuel consumptions

were with acetone 7.76 litres/100km and without it

7.42 litres/100km. (Apologies for the european units).


How dumb can you be?

Why use acetone, ever see what acetone does to paint on your car, or even plastic, why would you want to put that into yout tank? there are all lots rubber plastic parts all around the fuel system. You could be looking at a costly engine repair. You may benefit for the short term, and pay for it in the long haul!

It would probably be safer to piss in the tank than use acetone.

Just my 2 cents,

Acetone in our 97 Merc. Tracer and 84 Ford F250

I recently found this site and thought 'what the heck'.

I tried a ratio of 1oz. acetone to 5 gal. of gas in my 84 F250 with a '76 mfg. 300 inline 6 cylinder, 1bbl carb., auto trans. Typically, I got 14 mpg. With acetone, I get a 22% increase!

Tried it in Mama's 97 Tracer. 4 cyl., F.I., 5 speed. Typical mpg., 20/22. With acetone, almost 30 mpg! And we don't have to 'push' it uphill!

Thanks guys for posting the info for us!

Jon in AZ

p.s. chainsaw is next!

Acetone in Fuel


I too have used acetone and saw variables in results just as others have seen. What I discovered that it was related to the fuel type, as well as vehicle type. With so many variables, here is the most important thing to note. Avoid all stations with ethanol added. Simply look at pump for label 10% ethanol. I work with other fuel catalysts, and it appears it effects our is at a lessor degree, only a few percentage points, but with acetone, I see a drop of 20% or more in fuel efficiency over using it without ethanol.

Another important point is your vehicles ECU settings. The later model vehicles have an istantly adjustible fuel monitoring ability, while older or less expensive vehicles have a unit that will not respond for up to 400 miles of driving. Simply put, if your vehicles fuel mileage drops, as many have reported with acetone, this may be the same reason we see lessor results with our fuel catalyst. Still, a lessor effect, but one that has to be noted or you may stop after the first tank thinking it does not work.

Of course, more is not better as well, so keep that in mind. With acetone as well as with our Enviro-Max-Plus, we find it is best to start with only one ounce per 5 gallons to start, and check results, then double up to two ounces to test for any improvements. With Enviro-Max-Plus we find that after the engine is cleaned, then we can drop back to one ounce per ten gallons, and this is similar with acetone, you have to try different ratios, then adjust again after about one thousand miles by reducing amount used. Research and watch video and Johnny Rutherford endorsements, plus the no risk 100% 90 day money back guarantee.

Fight Back Against BIG OIL

Acetone in Fuel

It seems to me that acetone in fuel is nothing new.

Back in the early 1960's we were using it with our

racing fuel. Yes we even used it with menthanol, and

140 octane gas (leaded) which cleaned the motors

where unleaded don't.

We used it mostly for a coolant with our fuel to

reduce the combustion tempatures. Where not only

spark tempature and heat are a problem, not too

hot or not too cold but just the right combination.

At that time one could use a little bit of proplene

oxide (liquid form) for a fuel exciter then use the

acetone to cool it back down, fuel burns more complete

and hotter so the acetone cooled the combustion to

help from cooking the motors.

we could pickup just with a one ounce per gallon of

the propalene and two ounces of the acetone. On a

four mile road course 14 seconds a lap faster. Now

thats a little bit of power boost. We could also

get more mpg and power if we used some others like

nitro and additives.

The only bad part is our fuel was costing us over

7 dollars per gallon. But what's winning about?


The burden of proof always rests with those that make a claim that something has produced an extraordinary affect. There have only been anecdotes, laced with pesudoscience, regarding increased mileage from the use of acetone. I’m not sure how long these claims for acetone have been around but I well remember hearing them for over 40 years now and feel confidant it goes back to at least WWII when there was fuel rationing. In all these years there hasn’t been one oil company, engine manufacturer, government or university, in the entire world, that hasn’t stumbled upon this? Don’t get me wrong, I, like everyone else, would be ecstatic if something ever came of it but, I’ve been waiting for something, other than anecdotes and pseudoscience, for decades while people have been trying it. Without fail, everyone I know that has used it (just my experience), gave up on it after some time. Point me towards a university study.

If it were to increase mileage by 10% to 30% as we hear, where would that energy come from? If acetone increased mileage by enabling the fuel to burn more completely, someone would be selling it as a surefire additive to easily pass the strict emissions test in CA. Wouldn't the EPA mandate it? Even if you could achieve complete oxidation of the fuel, wouldn’t it mean straight gasoline and diesel is burning so poorly that 10% to 30% of it is leaving the engine as unburned hydrocarbons to be able to account for the 15% to 30% mileage increases we hear about in both gas and diesel vehicles? As I recall, HC emissions are somewhere around 100 parts per million or so (pre cat) - I may be off on that as it’s from memory. Even if that number was grossly higher, that’s not going to provide the BTUs to get much of an increase in mileage.

Fuel mileage is greatly dependant upon the way we drive. If you are getting increased mileage, try having your spouse add the acetone without your knowledge and instruct them to sometimes add it and sometimes not add it and to keep records while you keep records of mileage. Compute the mileage by filling the tank all the way to the neck each time and record the odometer readings. Do not use a "Scangage" or anything other than a calculator. The computer readout of mileage in my new car (through the ECM) is always off - sometimes high and sometimes low.

Anytime Mr. Louis Lapointe would like to discuss the chemistry of this with me in a public forum, I’d be more than happy to do so.

First Tank Full

This is my first experiment with Acetone/Gas. I am using 1 oz. Acetone and 1 oz. Xylene per 10 gallons of gas.

I drive a 2004 Mercury Sable. Prior to using these additives a checked my mileage. It was 21.5 MPG Average.

My morning commute is 47 miles of mixed highway and country dirving. Also quite hilly. Upon arriving at work,

my mileage incresaed to 23 MPH. I will continue to provide updates.

Another First Tank Story

I have a 2003 Ford Ranger V6. I came upon this web site and thought I would try the acetone additive. I have been logging, on Excel, regular MPG on this truck since new in 03. My mileage runs average about 20mpg. I have gotten about 23 on the high and about 19 on the low side. My driving is consistant, on the same roads with the same routes, which is country paved at about 55mph. I used 2oz of acetone per 10 gallons and I have a 20 gallon tank. I always fill to approx. the same point each fill. With acetone my mileage was 21.7, just about around the average, certainely not higher than any high I have obtained. With the last refill I again used 2oz/10 before I did the mileage calculation. I will re-check mileage on the next fill just out of curiosity. The result I got in no way justified using acetone. There was absolutely NO change in gas mileage. For you people claiming good results I would encourage you to take long term MPG calculations before using acetone, as the tank to tank mileage may vary. You need to do long term averages to understand if acetone works. But From my results I think the claims are bogus.

As stated above I did a mileage check on my second tank with acetone added. Second tank yielded 21 mpg. Right in line with my usual mpg WITHOUT acetone. My results show no gain, which seems right, because acetone adds no more energy value to gasoline. I have gone back to straight gas.

Headline text

Why would you risk wrecking your engine over 1.5 mpg, Acetone damages the prior post stated... this forum is dangerous

First use 29 Mpg to 41 Mpg

Please send to proper area thanks.

1991 Honda Accord L 4 Cyl., no a/c, 265,000 KMs

Canada = 4.54 litres to an Imp. gallon.

Previous average MPG before acetone,- mixed driving was 29 MPG.

My info is mixed Km and miles....I know.

I took a trip today of 185 Km mixed driving (60km town). Put in 3 oz. of acetone /instructions for a 14 gallon tank. Filled tank to first click. On returning I put in $13 at the same gas stn, to the 1 st. click. , same price /litre of 83.5 c.

Math not being my best subject I have calculated this to be 41 MPG !

The first thing I noticed was when roughly 15 miles out my RPM dropped from 2850 to 2650 RPM @ 105 KMH, which held. Engine warming up ? I dunno.

Be darned if I can figured % difference compared to before. Is it 12% as my son says . Doesn't really matter to me, 12 MPG more than I used to get Wooohooo! What'll happen when all the sludge/crap is cleaned out of the engine. More Woohooos I think.

I only bought a 1/2 lite can of acetone which is a really high price /fillup, therfore I will now buy it by the gallon.

If someone wants to burst my bubble with full calculations thats ok, but some math pro please help.

Ethanol and Acetone Mix

On Nov. 28, 2006, 'Wild Bill' wrote:

Effective mixture from old dirt biking days. I was only 12 years old and would go to the drug store, buy 16 or so oz. of methanol or ethanol alcahol and then mix an oz. or two of acetone as a stabalizer into premium aviation fuel. Wow, what a combo in an 70cc Honda. You can do the same type combos for auto fuel additives and it works. Only drawback I had heard is that it can hurt certain o-rings and neoprene, but never experianced it.

Now considering basic fuel enhancers for LS1 running 12's at the drag strip. Hmmm ?

Old 1978 F150 ford pickup

On Nov. 27, 2006, Jim Johnson wrote:

Have increased fuel mileage from 10 mpg to 13.686557 mpg using acetone, miles driven-386.7 gas used 28.254 gal. Old 1978 ford F150 pickup A+

3 oz acetone 3 oz xylene mix per 10 gallon cheap regular gasoline, works great for me when used in my old 1978 ford pickup, speed driven 60 miles per hour both ways

See also

Directory:Fuel Efficiency Additives

Directory:Fuel Efficiency


Directory:Fuel Efficiency - main index

News:Fuel Efficiency

Directory:Fuel Efficiency Vehicles


Directory:Energy from Roadways

Directory:Solar Pavement

Directory:Power-Generating Shock Absorber


Directory:Fuel Efficiency Additives

Directory:Alternative Fuels

Directory:Fuel Pre-Heating for Mileage Improvement

Directory:Fuel Efficiency Hydrogen Injection

Directory:Hydroxy or HHO Injection Systems

PowerPedia:Hydroxy Generators for Fuel Efficiency

Directory:Running Vehicles on Water

Directory:Clean Fuel Conversions

Directory:Spark Plugs

Directory:Hypermiling -- Driving Tips for Better Mileage

Directory:Boron Additive


Directory:Electric Vehicles

Directory:Hybrid Vehicles

Template:Electric Vehicles footer - more EV listings


Directory:Fuel Efficiency Retrofits


Directory:Air Cars

Directory:Ambient Air Engines






Directory:X Prize:Automotive

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Why it works: A Theoretical Perspective from an Automotive Engineer

The thermal efficiency of an internal combustion engine depends upon the expansion ratio. This is the ratio of volume when the piston is at bottom dead center to the volume in the combustion chambers when combustion is complete. If it takes half of the power stroke to complete combustion, the cycle would have an effective expansion ratio of 2. If combustion had completed before the piston even began moving down (the ideal scenario), the effective expansion ratio would be equal to the mechanical compression ratio, a number much higher than 2. Combustion efficiency - how much fuel burns as a percentage - is around 95% or higher in most modern engines under typical operation. The true issue is combustion rate. Combustion theory holds that fuel must be in a gaseous state and mixed with an oxidizer (air). The smaller the fuel particles, the faster combustion can occur and complete.

Acetone has the intriguing property of maintaining a high molecular kinetic energy. If you get it on your skin, you'll notice it feels cold. This is because it evaporates so quickly, absorbing heat. When added to a hydrocarbon liquid fuel like gasoline, it increases the fuels volatility so that when it experiences a pressure change, such a flowing through an injector, it will vaporize more completely in the same amount of time as compared th the untreated base fuel. Improved vaporization increases access to oxygen which in turn increases the rate at which the fuel will burn. Completing the burn sooner increases the effective expansion ratio, reduces the amount of heat lost to the cooling system, and allows the burning fuel to fulfill the useful function of creating effective pressure to drive the piston. Thermal efficiency, not combustion efficiency, is the primary factor at work.

As for the safety of acetone, I personally would not recommend using it as a fuel additive in a car older than ten years, purely because of existing wear. That aside, bear in mind that many fuel system cleaners and other additives sold at auto parts stores do contain acetone and other harsh petrochemical solvents. The fuel systems of modern cars are generally designed to handle these owing to the fact that many different additives - both owner use and from oil companies - will hit the fuel systems at some point during the cars' lives.

The reason I have conceived to explain why oil companies usually don't use acetone as an additive is not that profits are to be lost, but rather that the increased volatility (causing the fuel to evaporate faster) will make the fuel more sensitive to temperature changes and thus more difficult and dangerous to store and transport. I recommend acetone use only as an end use additive, in the fuel tank of the vehicle that will burn the fuel. For gasoline of any grade, I'd suggest adding no more than 2 fl. oz. (60cc) of acetone per 10 gallons of gasoline slightly less for diesel. The chemical has an almost catalytic effect, so very little is actually required. Too much would actually be detrimental to engine performance. Only use pure acetone not nail polish remover. Be extremely careful as acetone is a strong solvent that can quickly dissolve paint and most common plastics. Use a funnel always and hold it in a glass or metal container. Any use of this additive must be considered at one's own risk.