Date:         Fri, 3 May 2013 11:18:16 -0400
Reply-To:     Marc Perdue <mcperdue@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Marc Perdue <mcperdue@GMAIL.COM>
Subject:      Re: Sucky Gas Mileage - ethanol free
In-Reply-To:  <CAFnDXk3Q7=TUXG3M4XVDs65wYLUpEaHG4Ma9=aMdjLrQWzHY0Q@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

Considering gas mileage of the different fuels:

Base gasoline is 114,000 BTU/gal.
200-proof ethanol is 77,000 BTU/gal.

So, it follows that:
E10 = 110,300 BTU/gal.
E15 = 108,450 BTU/gal.

A gallon of blended gasoline/ethanol has lower energy content and gives you
lower mileage. They don't put the ethanol in gasoline to improve fuel
economy. Theoretically, your mileage should drop by something on the order
of 3-5%, depending on which fuel you use.

Happy Friday everyone!
Marc


On Fri, May 3, 2013 at 10:26 AM, Jim Felder <jim.felder@gmail.com> wrote:

> I hear you on the infrequently used engines, and they also tend to be
> 2-cycle with more vinyl tubes, rubber parts and diaphrams than you would
> find in a car. I got so sick of taring down the carbueretors on my
> weedeater, lawnmower and generator, even with stabil in the tank, that I
> finally resorted to paying $4.10 a gallon for ethanol free gas. I have not
> had a problem since. My generator is run so infrequently, though, that I
> just ran it dry and am keeping my fingers crossed.
>
> Jim
>
>
> On Fri, May 3, 2013 at 9:13 AM, Don Hanson <dhanson928@gmail.com> wrote:
>
> > ---------- Forwarded message ----------
> > From: Don Hanson <dhanson928@gmail.com>
> > Date: Fri, May 3, 2013 at 7:07 AM
> > Subject: Re: Sucky Gas Mileage - ethanol free
> > To: Rocket J Squirrel <camping.elliott@gmail.com>
> >
> >
> >    In my inline motor, 5sp  tin-top van, which I try to drive at about
> > 65mph on the highway and no faster, I see approximately 1.5 to 2 miles
> per
> > gallon of extra distance when I fill with pure gasoline.   I have not
> gone
> > back through all my gas logs to get a statistically exact comparison when
> > using the two different fuels, but that is about what I always see.
> >   Most non-ethanol fuel is also "premium" with a higher octane number, so
> > that may also be a factor in the better MPG figures.   Dunno for sure but
> > at near sea level, I seem to feel slightly more power from premium no
> > ethanol fuel...a little less accelerator pedal pressure to hold the speed
> > to 65mph..
> > The pure gasoline also ages much better, I try to keep that in my
> > infrequently run engines, like chainsaws and some of my motorbikes...
> >   Don Hanson
> >
> >
> > On Thu, May 2, 2013 at 7:49 PM, Rocket J Squirrel <
> > camping.elliott@gmail.com
> > > wrote:
> >
> > > "Problem is.....ethanol-free fuel sells for a premium akin to diesel or
> > > high test.  Which eliminates any advantages the small increase in fuel
> > > economy gives you."
> > >
> > > I am curious to see how many extra miles per gallon E0 gives over E10.
> > > To that end, while I'm not logging cost, I have been alternating
> > > tanksful of fuel between E10 and E0 since September and logging
> mileage.
> > > In four short months I will have the results of a year's worth of
> > > fill-ups. Stand by.
> > >
> > > --
> > > Jack "Rocket j Squirrel" Elliott
> > > 1984 Westfalia, auto trans,
> > > Bend, Ore.
> > >
> > >
> >
>