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#2749602 - 09/20/12 03:24 PM Making pure gas from E10?
Kestas Offline



Registered: 06/04/02
Posts: 11881
Loc: The Motor City
Is there a good way to scrub ethanol from the gasoline for use in our garden equipment? I was thinking of buying pure gas from a marina next time I'm near one, but people tell me it cost $6/gal.

Is it as simple as adding a good amount of water, shake, let settle, and decant the gasoline? Has anyone tried it?

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#2749624 - 09/20/12 03:40 PM Re: Making pure gas from E10? [Re: Kestas]
Rand Offline


Registered: 08/20/03
Posts: 11978
Loc: NE,Ohio
better off buying the marina gas for 6$
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#2749627 - 09/20/12 03:43 PM Re: Making pure gas from E10? [Re: Rand]
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4154
Loc: Houston, Texas
it usually costs about 80 cents per gallon more.
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#2749637 - 09/20/12 03:51 PM Re: Making pure gas from E10? [Re: Kestas]
JHZR2 Offline



Registered: 12/14/02
Posts: 40429
Loc: New Jersey
I'd want to dry that gas before burning it.

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#2749662 - 09/20/12 04:16 PM Re: Making pure gas from E10? [Re: motor_oil_madman]
Turk Offline


Registered: 02/03/06
Posts: 9103
Loc: MN
Originally Posted By: motor_oil_madman
it usually costs about 80 cents per gallon more.


What a scam. mad

It used to cost 14c more a gallon for many years.
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#2749899 - 09/20/12 08:38 PM Re: Making pure gas from E10? [Re: Kestas]
Sonataman Offline


Registered: 01/15/12
Posts: 273
Loc: Ga
Phase separation!

Would think it best to have the fuel analyzed before use, but draining off the water is the fun part.

Lab style separatory funnel should work, but finding one for large scale use is expensive.

Have thought about this myself but you cost yourself 10% more just by removing the ethanol, plus time and dangers associated with handling gasoline.
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#2750112 - 09/21/12 06:16 AM Re: Making pure gas from E10? [Re: Kestas]
sdowney717 Offline


Registered: 10/01/05
Posts: 299
Loc: Newport News, VA
yes adding water gets rid of the alcohol.
Since the E in gas gives it a little octane you downgrade it from 87 to 84 at most. This will run fine in you older small motors. I dont know about a new lawnmower, it depends on its CRatio.

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#2750418 - 09/21/12 11:22 AM Re: Making pure gas from E10? [Re: Kestas]
Kestas Offline



Registered: 06/04/02
Posts: 11881
Loc: The Motor City
I suppose it would make more sense to start with premium so as not to suffer too much octane loss.

Dirving to a marina is very inconvenient for me. They're far away and not on the way to anywhere I drive.

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#2776944 - 10/18/12 09:43 PM Re: Making pure gas from E10? [Re: Kestas]
GMorg Offline


Registered: 01/29/06
Posts: 2435
Loc: Mizzou-land
I would think that you are likely to remove some of the detergents too.

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#2823411 - 12/04/12 09:58 AM Re: Making pure gas from E10? [Re: Kestas]
Darkfire Offline


Registered: 06/11/11
Posts: 129
Loc: MI
Originally Posted By: Kestas
Is there a good way to scrub ethanol from the gasoline for use in our garden equipment? I was thinking of buying pure gas from a marina next time I'm near one, but people tell me it cost $6/gal.

Is it as simple as adding a good amount of water, shake, let settle, and decant the gasoline? Has anyone tried it?


I ran "washed" gas all spring and summer for my lawnmower which uses a 4cyl Honda GCV-160. Ran perfectly fine, noticeably improved power and fuel efficiency from E10. I can cut a full 1/3 additional lawn surface area with the washed gas.

Use a "no spill" gas can that has the push button dispenser (the one where you can set it so the opening is on the bottom, parallel to the ground so that the water/ethanol mixture is the 1st thing that comes out because it's heavier).

I would get 4 gallons of 93 E10 (so that I would still have at least 89 octane after removing the 112 octane alcohol which is fine for a 4 stroke) then add one gallon of water. Shake well for 5 minutes continuously (somewhat of a workout). Then let it sit 30 mins, drain off the 1 gallon of water you added (an empty distilled gallon water jug works fine) plus the 51+ ounces of ethanol.

Rinse and repeat a second time to get any residual ethanol out. Then use an F15C Mr. Funnel fuel filter and filter the entire remaining contents through into another clean & dry 5 gallon container--this will catch any minute amount of free water.

Originally Posted By: JHZR2
I'd want to dry that gas before burning it.

After I do all of the above I add 1 ounce of seafoam. If you still weren't comfortable with that you could add a small amount of iso-heet red bottle. A lot of people have often used seafoam anyways so they wouldn't be changing anything additive wise.

I guarantee that if anyone tries this that whatever you run it in will run noticeably better than on E10.

Even before any isopropyl is added, there is zero water visible at the bottom of the remaining gas that was just filtered. I confirmed this by dispensing it in a clear container and inspecting it.


Edited by Darkfire (12/04/12 10:03 AM)

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#2823663 - 12/04/12 01:58 PM Re: Making pure gas from E10? [Re: Turk]
Samilcar Offline


Registered: 07/11/08
Posts: 1478
Loc: Iowa
Originally Posted By: tpitcher
Originally Posted By: motor_oil_madman
it usually costs about 80 cents per gallon more.

What a scam. mad

It used to cost 14c more a gallon for many years.

Still costs 10 cents per gallon more around here.

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#2829497 - 12/09/12 05:30 PM Re: Making pure gas from E10? [Re: Kestas]
Kestas Offline



Registered: 06/04/02
Posts: 11881
Loc: The Motor City
Today I just bought some premium (Shell 93 octane) to wash the alcohol. I used a clear glass bottle for washing. Add water to gas, shake it up, then let it settle. It seems that ethanol washes out of the gasoline rather quickly. The only thing that got me worried is that the gasoline remained cloudy, even after letting it sit for a couple hours. The water portion became clear with time. A second wash didn't seem to be necessary.

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#2829840 - 12/10/12 02:59 AM Re: Making pure gas from E10? [Re: Kestas]
Shannow Online   content


Registered: 12/12/02
Posts: 36939
Loc: 'Stralia
You could probably finish it with a zeolyte...which, funnilly enough is what I dry my ethanol with when mucking around with my biodiesel experiments.

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#2833022 - 12/12/12 07:18 PM Re: Making pure gas from E10? [Re: Kestas]
hatt Offline


Registered: 01/03/12
Posts: 3885
Loc: Florida
I'd just buy the $6/gal gas before messing with all that.
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#2834132 - 12/13/12 06:05 PM Re: Making pure gas from E10? [Re: Kestas]
Kestas Offline



Registered: 06/04/02
Posts: 11881
Loc: The Motor City
For some reason, the gasoline isn't all that cloudy anymore. Nothing has separated either.

I'd much rather mess with washing gas than to drive from one marina to the next, begging for pure gas. Washing the gasoline is faster and cheaper. Pure gas isn't as easy to come by in Michigan as it is in Florida.

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