[AT] antifreeze toxicity

[Cecil Bearden]

If you look at Walmart online, they list the RV and Marine antifreeze 
with a -50 freeze rating to less than $3 / gallon. That is a lot cheaper 
than Sierra.  Is says you can use it in inboard boats, so I would think 
it would be ok for tractors....
Cecil

On 2/17/2019 2:56 PM, bloomis at charter.net wrote:
>
> I’ve heard of Sierra, did not know it was propylene. Since it is made 
> for automotive use then it probably has the corrosion inhibitors that 
> Ethelene has. I would research the effects of propylene on an 
> automotive coolant system before jumping in. We use propylene by the 
> 55 gallon barrel at work diluted for chilling wine tanks via ammonia 
> heat exchangers, for those tanks that aren’t directly ammonia chilled. 
> Has to be dyed, we use red which makes it pink, so you know if there 
> is a leak. Otherwise it looks like water. And in a winery where water 
> is always in use you’d never know. Unless that 10” PVC line splits 
> open, again. Why moving to stainless on all the mains. Speers strictly 
> recommends NOT using PVC for glycol lines, tho its pretty standard in 
> older installations.
>
> Bradford
>
> *From:* AT <at-bounces at lists.antique-tractor.com> *On Behalf Of *Brice 
> Adams
>
> I've used propylene glycol, Sierra, in all my old tractors for 20+ 
> years without trouble.
>
> I think it's about 2X ethylene glycol in price.
>
> On Sun, Feb 17, 2019 at 1:49 PM James Peck <jamesgpeck at hotmail.com 
> <mailto:jamesgpeck at hotmail.com>> wrote:
>
>     US manufacturers are supposed to be adding denatonium benzoate to
>     ethylene glycol to make it taste bitter.
>
>     https://en.wikipedia.org/wiki/Ethylene_glycol
>
>     The sweet smell is how you know you are leaking coolant. The
>     additives may affect the smell.
>
>     The oral lethal dose for humans  is way more than a taste.
>
>     Propylene glycol is a substitute and antifreeze with it is
>     available. I do not know the cost difference. Propylene glycol is
>     also used as a food additive.
>
>     https://en.wikipedia.org/wiki/Antifreeze
>
>     I have been buying antifreeze based on price. Maybe I should
>     change my ways and buy propylene glycol brands.
>
>     Does anyone know of any reason why antifreeze based on propylene
>     glycol should not be used in older tractors?
>
>     [ John Hall] Agree, stench is added to some pesticides, why can't
>     it be added to this?
>
>
>
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