undisclosed ethanol content in gas
 

from wikipedia:

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?

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.

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.

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.

I agree. Arable land is already working full capacity and I dont think corn can maintain the entire US...

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.

Maybe taking action on ways to lessen demand on resources is appropriate at this juncture.

https://www.ethanol.org/pdf/contentmg...se_12507-1.pdf

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