Tegger wrote:
> John Horner <jthorner@yahoo.com> wrote in
> news:YeL1j.5127$dh.2362@trnddc05:
>
>> Tegger wrote:
>>
>>> You can find ethanol-free gas almost everywhere. It's usually in the
>>> form of the the "premium" octane grades, like 91 pump octane. The
>>> lower the octane, the higher the ethanol content. But you won't find
>>> non-oxygenated anywhere in North America now that MMT is out of use.
>>>
>>>
>>
>> You have that one backwards Tegger. Ethanol has a naturally high
>> octane
>> variously reported at somewhere from 113 to 129 and is used in fuels
>> in part to increase the final octane rating.
>>
>> http://www.gov.mb.ca/est/energy/ethanol/ethanolfaq.html
>>
>> http://en.wikipedia.org/wiki/Octane_rating
>>
>> In many cases premium fuels actually have a higher ethanol content
>> than their regular fuel counterparts because adding ethanol is one of
>> the simple ways to increase octane ratings.
>>
>
>
> I filled up today at a local Shell.
>
> On the pump was a sticker. It said:
> "87 octane: contains up to 10% ethanol
> 89 octane: contains up to 5% ethanol
> 91 octane: contains no ethanol."
>
> Want me to take a picture and post it?

The difference in energy content between E10 (10% ethanol) and E0 (no
ethanol) gasoline is about 3%. At about $3.00 per gallon, that works out
to $0.09. Not enough to make using higher octane worthwhile.

Jeff