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Thank you for the info. Charlotteville is the closest. Can you explain the percentages, smaller number more alcohol or less?

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Maryland comes up with zero
http://e85prices.com/archive.php?state=maryland&year=2013&month=allmonths

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So the number e85 is 85% ethanol 15%gas. E45 is 45% eth 55% gas. So you mix e85 with 89 octane unleaded to dilute the mixture from 85% to 45%. Gives you some benefits of ethanol without major carb mods. [/quote

What is the end result octane of E45?

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These questions have been popping up lately on E-85. I am also considering the changeover. So...Let's have some good input on this. Likes? Dislikes? Tips? Thanks,guys!!

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A few months back I was wondering about the actual octane of E85 (since all the usual web sites seemed to me to be quoting each other) so I went web searching and found this document:
http://ethanolrfa.3cdn.net/dd9e74ce1c454a97cc_rbm6bdgh3.pdf
It's full of good information about fuels, historical and current, and how and why various changes were made over the years. It also includes a chart for determining the alcohol content of a blend and it's a LOT more complicated than those cute little test bottles sold by the web sites that encourage E85 use. It also includes a statement of the octane of E85 that's sure to PO a lot of people who've accepted and quoted the number found on so many web sites. I found it interesting reading, you may not.

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These questions have been popping up lately on E-85. I am also considering the changeover. So...Let's have some good input on this. Likes? Dislikes? Tips? Thanks,guys!!

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I know most of the stuff quote in the article I do
disagree with his octane rating.. there is only 1
way to test true octane and thats on a knock engine
and I am sure he doesnt have one... we wrote our own
data base for release(Chrysler Fuel Lab which I was
part of) and we had to base the octane on US release
data since they are one of the few places that has
a knock engine... my own results say that its higher
than he posted.. my engine would be knocking big time
if it was low 90s....
As to the oil question that would be the only one I
have heard of... Chrysler doesnt spec any one oil
to stay away from... unless Penn feels that it could
be diluted on short cold runs on a drag strip..
otherwise I have no clue

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I know most of the stuff quote in the article I do
disagree with his octane rating.. there is only 1
way to test true octane and thats on a knock engine
and I am sure he doesnt have one... we wrote our own
data base for release(Chrysler Fuel Lab which I was
part of) and we had to base the octane on US release
data since they are one of the few places that has
a knock engine... my own results say that its higher
than he posted.. my engine would be knocking big time
if it was low 90s....
As to the oil question that would be the only one I
have heard of... Chrysler doesnt spec any one oil
to stay away from... unless Penn feels that it could
be diluted on short cold runs on a drag strip..
otherwise I have no clue

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Octane: A minimum octane for E85 is not specified. FFV’s
can tolerate the lower octane of gasoline i.e. 87 (R+M)/2.
There is no requirement to post octane on an E85 dispenser.
If a retailer chooses to post octane, they should be aware that
the often cited 105 octane is incorrect. This number was
derived by using ethanol’s blending octane value in gasoline.
This is not the proper way to calculate the octane of E85.
Ethanol’s true octane value should be used to calculate E85’s
octane value. This results in an octane range of 94-96 (R+M)/
2. These calculations have been confirmed by actual octane
engine tests.

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