Jeff <kidsdoc2000@hotmail.com> wrote in news:dpf1j.5251$Pt.1698@trnddc02:

> Mister Bear wrote:
>> Has anyone checked gas mileage (MPG) in the identical vehicle using an
>> ethanol blended gasoline in one fill-up, and then pure (non-ethanol) gas
>> in other fill-ups? All the gas pumps in my state have an ethanol
>> blend, so I don't have a chance to compare with pure gasoline. I've had
>> people tell me that pure gas delivers measurably better MPG ... better
>> by 10% or more. Has anyone checked one gas against the other in the
>> same car? Results?
>> MrBear
>
> Ethanol has about 30% less energy in it than the same volume of
> gasoline. So 10% ethanol gasoline should have about 3% less energy than
> regular gasoline. And you should get about 3% less gas mileage.
>



Esso in the province of Ontario started using ethanol last summer. Prior to
that they used MTBE, which is also an oxygenate. Before that it was MMT,
which is not an oxygenate.

With my very detailed recored keeping, I noticed a couple of percentage
point decrease in mileage when they switched from MMT to MTBE, but no
change going from MTBE to ethanol.


--
Tegger

The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/