Message-ID: <4061DB49.ADFEBB35@frontiernet.net>
Date: Wed, 24 Mar 2004 13:02:33 -0600
From: Jim Sower <canarder@frontiernet.net>
MIME-Version: 1.0
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Fuel Transfer
References: <list-3117572@logan.com>
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I've been researching mogas for a presentation to my EAA chapter and another
association I'm in.  Found out some really interesting tidbits.  Like:

You don't necessarily know at your local gas station if you're getting
alcohol, or how much.  Some brands (like Amoco and Mobil?) might be
different, but their exclusivity might vary from state to state.

When there IS alcohol, it's added as the tank wagon is loaded.  NONE of the
oil companies want alcohol (or any of the other "additives") in their storage
facilities.

Alcohol won't hurt composite fuel tanks.
Water won't hurt composite fuel tanks
Alcohol and water MIXED is MEASURABLY corrosive to composite tanks.
The threshold of damage seems to be about a 3% concentration.
Since alcohol concentration varies from about 5% to 7% or so, the guy told me
that my practice (up until now) of filling about half my tank (10 gal) with
hi-test mogas and topping it off with 100LL was probably OK but I'm taking a
chance if I continue this practice.

I got the notion that if you order up hi-test mogas and get it WITHOUT ANY of
the additives that are mixed at tank wagon load time, you've got something
very close to aviation grade mogas.

That's how far I got.  Still researching .... Jim S.

lm4@juno.com wrote:

> So I explained to the guy.
>         Av-Gas is kept seperate from other grades of gasoline.  It's sent
> down the pipe as the last load.  But as far as Mo-gas is concerned it
> goes this way in N.Y. State.  New York is a cross trade state.  Which
> means that any vendor can buy gas from any supplier and sell it as their
> brand.  BUT, as it happens, in this state Amoco does, and always has,
> kept
> their gas seperate and to themselves.  As in Amoco white.  It just
> happens
> that Mobil does almost the same thing.  They, Mobil, truck their gas into
>
> N.Y.S. and keep it to themselves. That's in N.Y.S.. Your state may vary.
> Larry Mac Donald
> Rochester N.Y.
> do not archive
>
> On Tue, 23 Mar 2004 20:34:07 -0600 "Russell Duffy" <13brv3@bellsouth.net>
> writes:
> > Rusty,
> > Do you have Alcohol in the fuel in your area? If so, how do you
> > ensure that
> > you don't end up with some in the truck from one station that is
> > left when
> > you go to fill up at the station that doesn't have it?
> > Bill Schertz
> > KIS Cruiser # 4045
> >
> > Hi Bill,
> >
> > I'm not sure I understood all that.  As far as I know we don't have
> > alcohol
> > in any of our 87 octane fuel, which is all the truck, and plane will
> > be
> > using.  It's likely that there's some alcohol in the 93 octane that
> > I've
> > been burning in the car with no problem.  Why would I be worried
> > about a
> > little alcohol anyway?
> >
> > Cheers,
> > Rusty (still in search of a pump)
>
> >>  Homepage:  http://www.flyrotary.com/
> >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html

--
Jim Sower ... Destiny's Plaything
Crossville, TN; Chapter 5
Long-EZ N83RT, Velocity N4095T