Acetone Increases Fuel Mileage

Thanks Patrick D



Date: 6/30/08 7:28 PM

Subject: Fuel economy: ACETONE sounds plausible. I understand camphor, moth balls, work in petrol engines by increasing octane also. But not as well as this!!! If true...
You are here: > News > March 17, 2005

Acetone In Fuel Said to Increase Mileage

Readily-available chemical added to gas tank in small proportion
improves the fuel's ability to vaporize completely by reducing the
surface tension that inhibits vaporization of some fuel droplets.

by Louis LaPointe
Adapted by Sterling D. Allan and Mary-Sue Haliburtonh LaPointe's
permission for Pure Energy Systems News

See also, Acetone Data • FAQ (includes possible negative effects)

Acetone (CH3COCH3) is a product that can be purchased inexpensively in
most locations around the world, such as in the common hardware, auto
parts, or drug store. Added to the fuel tank in tiny amounts, acetone
aids in the vaporization of the gasoline or diesel, increasing fuel
efficiency, engine longevity, and performance -- as well as reducing
hydrocarbon emissions.

How it Works
A colorless, volatile liquid with a sweet odor. It is considered the
least toxic solvent in industry. It can occur naturally. It is used in
the production of lubricating oils, chloroform, pharmaceuticals,
pesticides, paints, varnishes and lacquers. If present in water, it is
more likely to volatilize or biodegrade before bioaccumulating or
adsorbing to sediments. Acetone will also readily volatilize and
biodegrade in soil. It is also a common laboratory contaminant, so its
presence in a sample does not always indicate its presence in the
environment. Synonyms - Dimethylketone and 2-propanone.

-- Environmental Terms Glossary
(U.S. Military)
Additive: changes the specifications of the base it is added to

Complete vaporization of fuel is far from perfect in today's cars and
trucks. A certain amount of residual fuel in most engines remains
liquid in the hot chamber. In order to be fully combusted, the fuel
must be fully vaporized.

Surface tension presents an obstacle to vaporization. For instance the
energy barrier from surface tension can sometimes force water to reach
300 degrees Fahrenheit before it vaporizes. Similarly with gasoline.

Acetone drastically reduces the surface tension. Most fuel molecules
are sluggish with respect to their natural frequency. Acetone has an
inherent molecular vibration that "stirs up" the fuel molecules, to
break the surface tension. This results in a more complete
vaporization with other factors remaining the same. More complete
vaporization means less wasted fuel, hence the increased gas mileage
from the increased thermal efficiency.

That excess fuel was formerly wasted past the rings or sent out the
tailpipe but when mixed with acetone it gets burned, though the engine
still thinks it is running straight gas.

Acetone allows gasoline to behave more like the ideal automotive fuel
which is PROPANE. The degree of improved mileage depends on how much
unburned fuel you are presently wasting. You might gain 15 to
35-percent better economy from the use of acetone. Sometimes even

How Much to Use

Add in tiny amounts from about one part per 5000 to one part per 3000,
depending on the vehicle -- just a few ounces per ten gallons of gas.
This comes to between 0.0003 % to 0.0025 % acetone maximum or
approximately 1/15th of one-percent. Note that is around .78 cc per
liter or one ounce per 10 gallons. Not more than three oz. per 10

acetone.jpg (13884 bytes)

Figure 1:
Percentage MILEAGE GAIN when a tiny amount of acetone is added to
fuel. The curves A B C show the effect on three different cars
using different gasolines. Some engines respond better than others to
acetone. The D curve is for diesel fuel. Too much acetone decreases
mileage slightly due to adding too much octane to the fuel. Too much
additive would upset the mixture ratio because acetone (like alcohol)
is a light molecule and tends to lean the mixture.

Metric Conversions
One fluid ounce (US) is equal to 29 milliliters. Ergo, a 100 ml.
graduated cylinder would be a suitable choice for this project.

Ten gallons (US) = 40 liters
(As there are three zeroes after the decimal point before you get to
any numerals, I think that can be ignored to make the numbers easier.)

Note that the UK/Canada old imperial system is not the same as US
imperial measurements:

* Gallons (UK)
A British imperial capacity measure (liquid or dry) equal to 4
quarts or 4.545 liters.
* Gallons (US)
United States liquid unit equal to 4 quarts or 3.785 liters.

-- Mary-Sue Haliburton, PESN

After you first find the best gasoline in your area, then try the
acetone amount for your car per ten gallons, and if you are happy with
your newfound mileage, you might want to try stopping the use of
acetone for a couple of tanks. Watch the drop in mileage. It will
amaze you. That reverse technique is one of the biggest eye openers
concerning the use of acetone in fuel.

In a 10-gallon tank of gasoline, use one to three ounces of pure
acetone to obtain excellent mileage improvements. In a ten-gallon tank
of diesel fuel, use from 1 to 2 ounces of acetone. Performance goes up
too. Use about a half-teaspoon of acetone in the fuel tank of a
4-cycle lawnmower or snowblower. Or you can apply it with an

Where to Get Acetone

The pure acetone label is the only additive suggested and is easily
available from most drug stores in 16-ounce plastic bottles and in
one-gallon containers from some large fleet farm supply stores. But
any acetone source is better than none. Containers labeled acetone
from a hardware store are usually okay and pure enough to put in your
fuel. We prefer cans or bottles that say 100-percent pure. The acetone
in gallons or pints we get from Fleet Farm are labeled 100 % pure. The
bottles from Walgreen say 100 % pure. Never use solvents such as paint
thinners or unknown stuff in your gas. Toluene, benzene and xylene
have been okay if they are pure but may not raise mileage except when
mixed with acetone. However the aromatics also raise octane.

Adding Acetone to Your Tank

When you fill up with fuel, note the number of gallons added, then
calculate the right amount of acetone to add. Less is more. Remember
all gasoline is different. Some will work better than others in the
presence of acetone which is strictly a vaporization tool, rather than
a fuel additive that alters combustion. The car computer still thinks
it is running straight gasoline. None of your settings are altered.
None of your engine parts are affected. Check out ScanGauge for an
inexpensive MPG device.

Some stores sell acetone in metal cans of various sizes, which are
safe to keep indoors. However, it is difficult to pour from these
cans, which have a flat top and short neck from which spillage is
inevitable. In any case, while handling acetone, you should be wearing
rubber gloves.

One option is to get a small graduated cylinder (available from
science supplies store or some pharmacies). The small ones have larger
intervals between markings so that it is easier to fill them to the
level desired. The narrow cylinder can be held to the neck of the can
to catch all drips. Then from the cylinder you can pour neatly into
the tank. The small pouring spout suitable for laboratories prevents
drips onto the paint.

Being etched with neat lines at each milliliter, these graduated
cylinders are also good for measuring precise amounts -- in ounces or

Additional Benefits

In addition to increased mileage acetone added to fuel boasts other
benefits such as increased power, engine life, and performance. Less
unburned fuel going past the rings keeps the rings and engine oil in
far better condition.

A tiny bit of acetone in diesel fuel can stop the black smoke when the
rack is all the way at full throttle. You will notice that the exhaust
soot will be greatly reduced and your truck or car runs smoother.

Acetone can reduce hydrocarbon emissions up to 60 percent. In some
older cars, the HC readings with acetone in a 1986 GMC went from 440
PPM to 195, as just one example. Though mileage gains taper off with
too much acetone, hydrocarbon emissions are nevertheless greatly
reduced. Pure acetone is an extremely clean burning fuel that burns
in air with a pretty blue, smokeless flame.

Acetone reduces the formation of water-ice crystals in below-zero
weather which can damage the fuel filter. Change that fuel filter
every year to protect injectors.

There are no known bad effects and every good reason to use acetone in
your fuel. I have never seen a problem with acetone, and I have used
ACETONE in gasoline and diesel fuel and in jet fuel (JP-4) for 50
years. I have rigorously tested fuels independently (with burns all
over me) and am considered an authority on this important subject.

Acetone and Your Engine
Acetone is known to deteriorate cheap plastics and other substances.
While the components in a car's fuel system should be of high quality,
and thus immune to any deleterious effects from exposure to acetone,
be aware that "ideal" is not always the case in practice. Be advised
that not all systems have been tested against acetone. Until such
thorough testing has been accomplished and certified by a accredited
authority, you assume your own liability for experimentally testing
acetone in your particular system.

Keep acetone away from painted surfaces, such as the paint on your car
under the gas tank opening. Acetone is the key ingredient in paint
remover. In addition to paint, fuels, including acetone, gasoline
alone can also dissolve asphalt and most plastics.

Never allow skin contact with it. It may damage clothing as well.
Don't breathe it. Keep children away from all dangerous chemicals.
Read the directions on the container.

Acetone is a highly flammable liquid, as is gasoline. Do not expose it
near a flame or spark. Acetone should be stored outside, with proper
ventilation, not inside your house. Gasoline and/or acetone will
dissolve cheap plastics, so be sure the container you store it in will
not deteriorate. Read all the precautions on the labels.

No Issues with the Engine Parts

I have soaked carburetor parts in acetone for months and even years to
see if there is any deterioration. Any parts made to run with gasoline
will work with acetone just fine. I presently have parts soaking in 1,
2, 5, and 10 % acetone/gasoline mixes as well as just gasoline. That
is 20 to 200 times too much just to be sure. The 30R7 rated parts are
in perfect condition. All my tests have been run with Texaco gasoline.
I tested the gas stations in my area to FIRST find the best gasoline
BEFORE putting acetone in the tank. But I have no idea from a
pragmatic view what other gasolines do except that when I attempt to
use them, my MPG drops like a rock. So for purely monetary reasons, I
run the best available gasoline. When my dyno is built this summer, I
will test all the gasolines in my area and publish the results on the
web. I hear from engineers out West that Chevron gas is very good. I
used it and it was fine during trips to California. I attach more
credence to engineers who report things of interest to me because of
their training and knowledge of testing methods. You may want to look
up Science and Testing Methods in my site.

Contrast with Alcohol

In contrast, alcohol has been shown to be corrosive in an engine, yet
they put THAT into gasoline. Alcohol in general is anti-mileage.
Alcohol is no good in fuels. In Brazil, millions of engines and fuel
systems were ruined by alcohol. Yet they are talking of doubling the
amount of alcohol in gasoline.

Furthermore, alcohol increases surface tension, producing the opposite
effect from acetone. Alcohol in fuel attracts water. This hurts
mileage because water acts like a fire extinguisher. Some cars may run
badly and even quit due to the incombustible nature of the water-laden
fuel. We know of a dozen cars that recently stopped running due to
water in the alcohol and gas mixture. In my Neon, it frequently has
cut the MPG in half on trips when I take pot luck at the pump.

In below-zero weather, the water and alcohol can form abrasive, icy
particles that may damage fuel pumps and clog injectors.

Has Not Been Warmly Received

Questions asked of someone in the petroleum industry regarding ACETONE
will often automatically trigger a string of negative reactions and
perhaps false assertions. We may have heard them all. The mere mention
of this additive represents such a threat to oil profits that you may
get fabricated denials against the successful use of acetone in fuels.

The author has never found any valid reason for not using acetone in
gasoline or diesel fuel. Plus it takes such a tiny amount to work. No
wonder they fear this additive.

Political Action

You might Email this article to your government representative. After
sufficient data has been collected, and that data supports the
conclusions presented here, ACETONE should be ordered by Federal Law
to be present in all fuels. While you're at it, request that vehicles
be equipped with a MPG read-out to make it easier for consumers to
know what is and is not working to improve their mileage.

If You Want to Do Independent Testing

For those of you who like to see the data yourself, there is a great
little device available to check your exact gas mileage and more. See
ScanGauge for an instrument that fits any car 1996 or newer. And some
1995 models. It measures your real-time MPG, inlet and coolant
temperatures and many more details as you drive. This inexpensive tool
should end a lot of debate over what works for mileage and what does
not. We use the TRIP function to average the MPG at a steady 50 MPH
both ways.

Since the fuel from every gas station is different from the next, the
MPG performance will also vary. Then there exist a wide variety of
additive choices at the terminals that affect quality. Also other
variables in the cars performance such as warm external temperature
versus cold external temperature, using the AC or not, headlights or
not, incline of drive, etc. Try to eliminate as many of these
variable as possible in your comparative testing.

Be consistent where you buy your gasoline because different gasolines
vary tremendously. The best gas and the worst gas in your neighborhood
will likely have a 30-percent spread in mileage. Same for diesel fuel.
In my experience with repeated test results, I found that Texaco,
Chevron and Canadian Shell deliver excellent gasoline mileage. Try to
keep down the number of variables wherever you gas up by using the
same station, same pump, same grade or same octane before testing.
This is important.

Incidentally, in almost all cases, the lowest octane is best for
mileage. Most modern vehicles do not have high enough compression to
justify using high octane fuels. The testing indicates best mileage is
usually obtained with 85 or 87 octane gasoline. Too much octane causes
a loss of power and economy. BUT too little octane causes the same
things plus knocking. Listen carefully to your engine for tell-tale
knocks or clicks when you start out from a light. The best mileage
points to the correct octane when the engine is properly tuned. See
your owners manual.

The ScanGauge enables you to notice differences and then check
variations with and without acetone added in various proportions.
Roughly 1/20 to 1/10 of one percent. On the dyno I never exceeded 1/4
of a percent. There was no point.

Report Your Findings

PES Network Inc. has created an index page at PESWiki where you can
report your findings. PESWiki is a publicly editable website where
you can post a summary of your results, or create a full page, with
all the details you wish to report, with images and links to video or
spreadsheet data.

Other Additives Exist

There are of course other additives that improve mileage (which also
have had less than a favorable reception by the petroleum industry).
Certain octane improvers for example also aid mileage. We recently
proved that Carb Medic from Gunk can raise mileage when 3 oz. are used
with 2 oz. of acetone per 10 gallons of gasoline, even in cold
weather. Acetone seems to help cars start easier in winter.

Many products claiming to improve mileage are expensive and do not
really help much. Others are fakes. For instance, a SMOOTH flow of air
into a carburetor or injector is far better for mileage than turbulent
air. Turbulence is bad. Yet many people deliberately introduce
turbulent air into their engines. There are many silly myths floating
around the car industry to fool the average person. Another is that
cold intake air improves mileage. NO. Warm air improves mileage.

Test for yourself. Take a mileage check for each and every tank of gas
or diesel fuel like we do. Your actual mileage is NOT that of a single
tank full but the average of perhaps five tanks. To be accurate, you
should not miss any checks. This takes discipline to get reliable
results. Someday your car will do it for you with a factory MPG gauge
on the dash. But for now, YOU ought to keep tabs on your mileage for
all our sakes.

# # #


The above story was adapted with permission from a story reported at:

From: Louis LaPointe
March 19, 2005

Something that might be added:

In early 2004, a SmartGas reader in New York State filled three
bottles with: pure acetone, part acetone/part gasoline and straight
gasoline. Into these he placed O-rings, pump diaphragms, plastic
fittings, hose parts and other neoprene/n-buna stuff. He duped my
experiments from back in the 50s. Months later he told me the pure
acetone bottle was slightly darkened and some vinyl parts swelled.
Dave had carefully marked all the parts beforehand. He dried the parts
to mike them again and noted after six months that the growth was
about two-percent to five-percent in the bottles with gasoline, which
was well within limits. Almost unnoticeable. He put the stuff back
into the respective bottles where it may still be today. Dave has a
background in physics and engineering. I suggest testing parts as
mentioned above, in 1, 2, 5, and 10 % mixes of gasoline and acetone.
This is up to 200 times more concentrated than what we use in real
life. No sense being ridiculous.

He believes that everyone should do their own testing and not listen
to the prejudiced opinions or words of others. There is way too much
misinformation out there.

When using acetone, I often add one of several other mileage additives
into my 16 oz. Walgreen's plastic acetone bottle which stays in the
trunk so as not to carry a large quantity container in case I get
rear-ended. I am building a dyno facility to further test all the
mileage additives and get perfect mixture figures to appear on the
site this summer, I hope. Meanwhile the ScanGauge is being used daily
by numerous persons across the U.S. running acetone and various
carefully devised mixes and lubricants. Some oils can improve mileage
substantially, notably Torco Oil.

Using the ScanGauge at 50MPH, my best mileage was 48-52 in my Neon a
few weeks ago. Then I stopped the acetone to do some reverse testing.
The next four tanks of the same Texaco gas showed 42-43, 37-38, 33-34,
30-31. No acetone when each tank was filled at half-full. The drop was
about 20 MPG overall. Recent tests at a steady 50 MPH show 61-63 MPG
in the Neon. People report OVER 62 MPG in Toyota Prius vehicles with a
tiny bit of acetone in the gas. The other person with me each time
wrote down the results. Single source reporting is not a good idea.

Clear thinking guys want us to get off the Middle Eastern Oil. It is a
national crisis. But to confirm this specific additive takes
procedural knowledge, not undisciplined views or flash opinions. That
makes engineers the best source of information of what goes on out
there. The less controversy the better, if possible.

I finished a science article on the site--how to go about
testing. It concerns induction and the Scientific Method.

Thanks to all, Lou LaPointe
ScanGauge II ScanGuage II - Track your automobile statistics with
ease. Unit plugs into the diagnostic connector found under-dash on
1996 and newer cars and light trucks.
See also

* Fuel Economy > Acetone as a Fuel Additive - project index at
PESWiki for reporting data from actual road tests using acetone.
o FAQ - What does acetone do to the fuel system components?
How much do I add? Will it hurt me? How does it effect performance?
o Lubricity of Acetone in Fuel; Ester's Solution - Acetone's
positive results in mileage, idle, emissions, power, come in part from
its engine cleaning effect, removing the carbon build-up. Does acetone
degrade lubricity, creating long-term wear issues? Data from years of
acetone use do not show unusual wear. Esters purported to afford added
protection. (PESN; April 13, 2005)

* Pure Energy Systems News
* This Week in Free Energy™ - Weekly five minute blurb.

Page posted by Sterling D. Allan March 17, 2005
Last updated December 26, 2007


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