From: ygmir (ygmir@onemain.com)
Date: Thu Sep 29 2005 - 09:41:45 PDT
HI Harry,
My understanding is:
Low octane isn't the issue with bad gas. Low volatility/varnish is. Octane
only relates to the burn rate, and, ease of ignition, of said gas. The
higher the octane, the slower it burns,and, the harder to ignite, allowing
for more advanced ignition timing, and higher compression the engine can be
without pre-ignition (knock/ping).
So, it would seem, unless higher octane gas is more stabile, there would be
no advantage, since, lower octane fuel will ignite easier.
I'd say it's the loss of 'volitile' components that makes the gas go bad,
along with water and varnish formation.
Just some random thoughts.......
Henry
----- Original Message -----
From: "Dev Null" <devnull2@earthlink.net>
To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
Sent: Thursday, September 29, 2005 8:39 AM
Subject: Re: [MV] Generator - bad gas
>A while back I owned a motorhome with a big Ford 460 engine (with 4bbl
>carb) that burned regular octane gasoline. I would always store the
>motorhome in a barn over the winter (November -> April). A mechanic once
>told me to fill the fuel tank to the top with high octane gasoline on my
>last fillup before storing it. Every spring that old 460 started up just
>like it was run yesterday.
>
> After my last trip I stored the motor home for about thirty months before
> selling it. Again it started right up without a hitch (after thirty
> months). The new owner drove it away with a tank full of three year old
> gas.
>
> According to that mechanic, as gas ages, the octane rating decreases so
> storing a vehicle filled with high octane gasoline gives the gas some room
> to age and still be useful. I believe the product Stabil 'stabilizes' the
> octane.
>
> Additionally filling the tank completely helps reduce water condensation.
>
> I also use high octane gas in my lawn mower and my oil-mix weed trimmer
> and chain saw. I leave the gas in the tanks all year long. Some times
> the oil-mix gas is used over two or more years (depending on how many
> trees get knocked down over my driveway by wind and ice).
>
> harry
>
>
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