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Old 04-20-2008, 04:57 PM   #1
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undisclosed ethanol content in gas

from wikipedia:

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In several states, ethanol is added by law to a minimum level which is currently 5.9%. Most fuel pumps display a sticker stating that the fuel may contain up to 10% ethanol, an intentional disparity which allows the minimum level to be raised over time without requiring modification of the literature/labeling.
I know that E85 gas usually results in poorer gas mileage due to less energy per volume..so that means "using that example" that getting gas from Shell results in poorer gas mileage than another random gas station what uses pure gasoline???

Has somebody researched this before?
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Old 04-20-2008, 07:36 PM   #2
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Some studies claim fe increase at up to 20% ethanol concentrations.
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Old 04-21-2008, 03:14 AM   #3
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Some studies claim fe increase at up to 20% ethanol concentrations.
I dunno if you've seen it on your Tempos, but the Tempo I was borrowing a lot did ~25mpg on "random" gas and ~29-31mpg on Sunoco, which has the "May contain 10% Ethanol" sign on the pump. My other vehicles aren't so keen on Sunoco.
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Old 04-21-2008, 05:23 AM   #4
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Originally Posted by Rayme View Post
I know that E85 gas usually results in poorer gas mileage due to less energy per volume..so that means "using that example" that getting gas from Shell results in poorer gas mileage than another random gas station what uses pure gasoline???

Has somebody researched this before?
Well, when RFG was mandated by the EPA to the Milwaukee metro area in the late 90's, here's some things I learned.

First, the expansion of ethanol is different than gasoline. It's made in huge batches too. So, first, recognize that we're talking hundreds of thousands of gallons in each recipe. Next, if it's made within spec the 10% ethanol, by volume adds about 2.8% oxygen to the mixture, but the law allows a variation between 1.7 to 3.5% oxygen, which is a swing in the volume of ethanol because of production mixing and by expansion and contraction through temperature changes.

Finally, gasoline isn't very different from manufacturer to manufacturer because of a lot of the Clear Air Acts from the early 90's. Gasoline is a fuel that is important to have in the supply chain, so it's distributed to everyone. Just because you have a Shell station, for example, it doesn't necessarily mean that it was made by the Shell manufacturing. Sure, it probably came in the tanker that it usually comes in, but it's origination is not known. It's in the retailer, manufacturer, and the distributors best interest to keep the supply moving.

I don't like ethanol mandates. It should be a choice.
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Old 04-21-2008, 12:09 PM   #5
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E85 would be good becuase although it yields less mpg, it could be produced much cheaper.

E10 makes no sense. Less mpg for the sam price as straight gas
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Old 04-21-2008, 12:16 PM   #6
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E85 would be good becuase although it yields less mpg, it could be produced much cheaper.

E10 makes no sense. Less mpg for the sam price as straight gas
Get rid of the government subsidy, and I don't know how one can make it cheaper. The increased cost of food is also a problem.
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Old 04-21-2008, 12:28 PM   #7
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I agree. Arable land is already working full capacity and I dont think corn can maintain the entire US...
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Old 04-21-2008, 12:52 PM   #8
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Get rid of the government subsidy, and I don't know how one can make it cheaper. The increased cost of food is also a problem.
I really don't like corn anyway but I'm sure they can grow more. The government had been paying farmers not the grow corn for decades.
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Old 04-21-2008, 02:24 PM   #9
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I agree. Arable land is already working full capacity and I dont think corn can maintain the entire US...
Maybe taking action on ways to lessen demand on resources is appropriate at this juncture.
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Old 04-21-2008, 03:06 PM   #10
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http://www.ethanol.org/pdf/contentmg...se_12507-1.pdf

Yes it's sponsored by industry, but the content agrees with my experiences.
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