Fuel conservation using acetone...

[boybi]

ang acetone, gagawin nyang mas hiwalay ang mga molecules ng gasoline para mas malaking surface ng molecule ang magiging exposed sa combustion process. kaya mas malaking porsyento ng gasolina ang masusunog sa loob ng cylinder, kaya mas swabe ang takbo ng makina at mastitipid sa konsumo ng gasolina. ;)

[BlueGirl]

sir off roader thanks for the added info about sa surface tension...tinanong ko din kasi fellow chemist ko eto sagot nya "by adding acetone to gas, your just diluting the octane rating of the gas to a lower level, thus poorer performance..adding a higher volume could saturate the gas tank and engine piston with volatile acetone and might pose a possibility of fire"...also the acetone should be used must be "analytical grade"...yung nabibili sa drugstore hindi ko alam ang grade nyan...iba-iba kc ang klase ng reagents depende kung saan siya gagamit...yan po sabi nya..siya tinatong ko kasi magaling sa physical chemistry yan eh..but im open to the fact that maybe acetone can help...im just afraid about its effect on your engine...sabi din nya incomplete combustion will produce a lot of smoke...naobserve mo ba ito sir GH nung nagexperiment ka?il be looking forward to the results of the tests of other tsikoteers...thanks...

[ghosthunter]

Acetone has an octane rating of around 150 and gasoline used is rated at 91. So how does that lower the octane rating of gasoline? And in the percentage used, I do not think the octane rating of the mixture has changed (either higher or lower).

As for smoke, no smoke was observed from the tail-pipe.

As for different "grades" of acetone. If we are using nail-polish remover, it might be valid but isn't pure acetone means there is not other ingredient in the bottle except acetone?

[orly_andico]

i would like to point out that the amount of acetone is very small; it will have no effect on the octane rating.

further, by (supposedly) promoting better vaporization, it will result in MORE COMPLETE combustion, and not the reverse as bluegirl's colleague seems to suggest.

further correction: the density of acetone is not the same as water! since the "recommended" dose is around 2.5 oz / 10 gallons of gasoline:

acetone is 0.785 g/mL (less dense than water)
there are 28.3 g/oz
conversion ratio is 36 mL/oz

"recommended dose" of 2.5 oz / 10 gal = 90 mL acetone / 38 L gasoline

my usual full tank ("hindi sagad" is around 41L although i think the tank capacity is around 50L.

i filled up yesterday, full tank shell velocity, added roughly 90 mL of acetone (a 120 mL bottle of 100% is 20 petot at watsons). i didn't use a graduated cylinder, just ratio and proportion (this is not rocket science, folks, it doesn't have to be exact).

also i question the "reagent grade" vs "consumer grade" issue. reagent grade has probably close to zero impurities, but the "consumer grade" is still labeled as 100% -- if it has 5% impurities i seriously doubt that will have any effect.

anyway, i have over TWO YEARS of mileage data for my car. i know one full tank won't be enough for accurate measurement, because in my two years of data, there's a lot of variation.

a more "robust" method which would average out any variances due to driving style, etc. would be to collect lots of data with acetone (at least 10 data points, that's 10 full tanks), then do a chi-square analysis with the old data (i can do this since I have all that old data). the result of the chi-square will tell us if the data with acetone, is significantly different from the old data. simple "i got 10% improvement" is not really conclusive.

[chase]

thanx for the info sir orly.

hopefully, we'll get a chi-square analysis by the end of june :D

TIA!

[ghosthunter]

adding a higher volume could saturate the gas tank and engine piston with volatile acetone and might pose a possibility of fire

er... isn't gasoline itself pose a possibility of fire?

And we aren't talking about a saturated mixture of acetone in gasoline. Its even less than 1% mixture.

[ghosthunter]

tinanong ko din kasi fellow chemist ko

is your fellow chemist knowledgable about petroleum products for such sweeping statements?

[JAYarc]

i conduct test too, in my 4g92 1.6L EFI and 110cc carburated motorcycle, (5th day)

*sadly i loss my data/records on car.

*my MC avearage fuel consumption is 46KM/L
i blend 667:1 ratio petrol 93rating : acetone, i already travelled 130.9km with 2.6L of fuel consumed; result 50.27km/L almost 9% conservation(using beaker w/marker)

not official since my driving style, traffic condition, local temp, ATM pressure, and humidity.. varies (not a controlled test)
my plan after several test is to reverse the process and compare..

i think IMHO, by adding acetone we loses some octane grade which will burn our fuel easier w/ help of chamber's pressure & heat+ spark.. afaik octane resist the ignition other than spark ignition..

that's why NotApplicable for high compression ratio engine 11:1++ they will experience knock/pre ignition at full trottle unless the car operate at vacuum stage where it leans the combustion process..>>hehe

?is high surface tension serve as = hight octane grade too?

[JAYarc]

for MC, acetone blend/petrol *3.92L fuel and *6ml of acetone(apollo brand)
my other concern is our emission w/ this blend hehe..>>

[quiksie]

how about the shell better mileage? totoo ba ito at meron bang halo ang gas nila?