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Old 09-02-2016, 02:30 PM   #21
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I wondered why the ethanol doesn't separate from the gasoline when sitting still in your gas tank for a period of time. I suppose it would if some moisture gets into the tank.

But without any moisture, I imagine that it remains homogenized. I would guess that the density of ethanol is very near the same as gasoline.

So why does the experiment work? Well, as they have said, the ethanol absorbs moisture or water. Water is more dense than gasoline, at about 8.345 pounds per gallon. Gasoline is about 5.87 pounds per gallon. Therefore the heavier water settles out and the ethanol goes down with it.

I plan on doing this experiment. With careful measurement, it should be possible to tell the % of ethanol that was in the gasoline. Most of the pumps say that there may be UP TO 10%, so it could be less, but probably not by much.
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Old 09-02-2016, 02:39 PM   #22
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Maybe use a paint mixer
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Old 09-02-2016, 02:46 PM   #23
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The e85 ethanol testers seem to operate on this premise of using water to determine ethanol percentage, so may be legit.

https://www.amazon.com/Holley-26-147...ethanol+tester
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Old 09-02-2016, 06:17 PM   #24
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the theory is with enough h2o, the etoh becomes miscible and will separate into the h20/water layer.

This will never get all the ethanol out, and imo could introduce more water than the ethanol could cause problems with.

By all means, please document the results. Use a 2.5 gal water jug, the one with the spigot as a separatory vessel.
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Old 09-03-2016, 12:53 AM   #25
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It mostly for

Lawn mower
riding lawnmower
weed eater
Edger
Power Washer

but figure I'd feed the versys the good stuff too...
AvGas from the local airport will do the job too. I get a 5 gal jug filled for 20$...so same price but the lead smells so much sweeter

As for the sience expirement. Water is a key trigger to corrosion in ethanol fuels and in very small quanties. Im sure you can make a rough separation on specific gravitates but I wouldn't put it in anything metal or worth more than that empty plastic bottle.
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Old 09-04-2016, 08:46 AM   #26
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Quote:
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It mostly for

Lawn mower
riding lawnmower
weed eater
Edger
Power Washer

but figure I'd feed the versys the good stuff too...
outboard motors too.
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Old 09-06-2016, 07:38 AM   #27
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I guess I'll be forced to try this. I have a pretty much brand new(only 2 cuts on it) and I haven't started it in a month. The PHUKER wouldn't start! me off almost ruined my day I was so mad.
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Old 09-06-2016, 12:47 PM   #28
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I guess I'll be forced to try this. I have a pretty much brand new(only 2 cuts on it) and I haven't started it in a month. The PHUKER wouldn't start! me off almost ruined my day I was so mad.
I hear you. I have to pull apart and clean the carburetor on my (new last season) lawn mower every other time I mow.
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Old 09-06-2016, 01:09 PM   #29
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I guess I'll be forced to try this. I have a pretty much brand new(only 2 cuts on it) and I haven't started it in a month. The PHUKER wouldn't start! me off almost ruined my day I was so mad.
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I hear you. I have to pull apart and clean the carburetor on my (new last season) lawn mower every other time I mow.
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Old 09-06-2016, 08:30 PM   #30
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$4/gal Ethanol free gas in Alvin, race gas too...

Anyone have lab access for quality testing? I can possibly use a knock motor to verify pre and post octane levels, but that's a slim possibility. I'll work on doing the conversions necessary to run this on a small scale in a 1000mL graduated cylinder so that I can see what's going on in verifiable increments. I can run Karl Fischer titration on the fuel (again pre and post test) to accurately verify h2o content...luckily for me I do some of this in my day job, and I enjoy it.

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Old 09-07-2016, 08:59 AM   #31
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that's a big one:

https://www.amazon.com/Chemglass-CG-...nnel+chemglass
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Old 09-07-2016, 11:08 AM   #32
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I'd rather clean the carb.
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Old 09-11-2016, 09:13 PM   #33
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There is also Hopp's Propane in Santa Fe... they sell VP's stuff. you can either bring your own container and they'll fill it from their drums, or you can order whatever you want in as little as 5 gallon sealed pails.
I was at Hopps a few weeks back and they could only sell the 5 gal cans from VP. They said the Texas State Ag people shut them down from dispensing they way they've done it for years because it wasn't an accurate delivery. Their only recourse is to buy a $900 certified graduated container, pump the gas into it, and then fill your container. Never mind they always have given me over the 5 gallons I paid for. Just another example of our quality government at work. The VP cans add about $10 to the price for 5 gallons.
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Old 09-12-2016, 09:36 AM   #34
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I was at Hopps a few weeks back and they could only sell the 5 gal cans from VP. They said the Texas State Ag people shut them down from dispensing they way they've done it for years because it wasn't an accurate delivery. Their only recourse is to buy a $900 certified graduated container, pump the gas into it, and then fill your container. Never mind they always have given me over the 5 gallons I paid for. Just another example of our quality government at work. The VP cans add about $10 to the price for 5 gallons.
That's bullshit. Lee only sells the VP in cans too. The 93* ethanol free stuff from Lee is sold as "race fuel" and they say can only pump into certified container. They also are not supposed to fill a container in the bed of a pickup, but no one wanted to lift my big one full.
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Old 09-13-2016, 12:05 PM   #35
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Excellent info, but this is really only useful for engines that need 87 octane...it specifically states that once the ethanol is removed from the gas you're hovering around 87 octane,

what about engines that need 93 or premium 95/97? (do we even sell that anymore?)

add toulene?
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Old 09-24-2016, 11:32 AM   #36
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I hear you. I have to pull apart and clean the carburetor on my (new last season) lawn mower every other time I mow.
I think my problem is i ran it out of gas thinking it would be emptied then it wouldnt cloog up. But wuat i think happened is it ran out but there was a tad of gas n there and that dried up and clogged the ports. Has to disassembled it blow it all out. Started on first pull
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Old 10-05-2016, 04:08 PM   #37
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Was just at Hopps in Santa Fe. They will not return to pumping gas from the drums; VP only available in VP cans from now on. Adds $17.75 per 5 gallons to the cost. Thanks State of Texas Department of Agriculture!
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