Joe,
I just got off the phone with my brother-in -law at the bus company. He
said that his chemical supplier offered to send a 55 gal. drum of methanol to
mix w roughly 160 gal of "summer" wash fluid. He asked me about it and I
thought this was overkill, but in view of what you and Paul tell me it's
probably about right (~25%).
Doesn't the methanol, at 35 - 40%, damage the rubber seal on the edge of
the window?
The good news is ..... He thinks the chem. rep. said "Methanol is up to
$3 (US)/gal" vs the best quote I got was $3.54/gal. Maybe I found a new,
cheaper source of methanol.
Tom
----- Original Message -----
From: Joe Street
To: biofuel@sustainablelists.org
Sent: Friday, November 24, 2006 9:01 AM
Subject: Re: [Biofuel] Methanol as Windshield wash antifreeze
Hi Tom;
I think washer fluid typically contains 20 to 40% alcohol but I notice that
on the cold days if I use the lower percentage the fluid can momentarily freeze
up on the windsheild after wiping leaving streaks of ice. The higher
percentage doesn't do this.
Joe
PAUL MILLER wrote:
Hi Tom: A friend who mixes windshield wash commercially uses 35% in the
winter. That is plenty strong for Montana, but if he uses that strength he
does not have to worry if the temp goes below -10F by several degrees.
Paul
----- Original Message -----
From: Thomas Kelly
To: biofuel
Sent: Thursday, November 23, 2006 6:33 PM
Subject: [Biofuel] Methanol as Windshield wash antifreeze
Help if you can.
I have relatives that own a bus company. They have 150+ gallons of
windshield wash fluid. It is not winterized. How much methanol should be added
to each gallon of washer fluid in order to prevent freezing to say ....
-10F (-23C) ?
I will experiment as follows:
Small sample of fluid in freezer .... check temp it freezes at
Add measured amount of methanol ..... check temp it freezes at
Repeat until I get a vol:vol ratio that produces the desired results.
I have other things to do tomorrow .... if anyone has a better
plan/knows the correct ratio it would be appreciated.
Tom
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