<div dir="ltr"><div dir="ltr"><div dir="ltr"><div>For a heat-transfer fluid, the interesting properties include thermal conductivity, specific heat capacity, and viscosity. Between ethylene glycol and propylene glycol, the first two are nearly identical. It's actually the viscosity that makes the difference.</div><div dir="ltr"><br></div><div dir="ltr"><a href="http://msdssearch.dow.com/PublishedLiteratureDOWCOM/dh_010e/0901b8038010e417.pdf">http://msdssearch.dow.com/PublishedLiteratureDOWCOM/dh_010e/0901b8038010e417.pdf</a><br><div><div><br></div><div>Choosing between propylene glycol and ethylene glycol fluids:</div><div>In addition to DOWFROST propylene glycol-based fluids, DOWTHERM® ethylene glycol-based fluids are also available. There are two major differences between propylene and ethylene glycol fluids: viscosity and toxicity. Ethylene glycol-based fluids are less viscous than propylene glycol-based fluids. Therefore, they generally provide superior heat transfer efficiency and better low temperature performance and are preferred for most heat transfer applications. </div></div><div><br></div><div><br></div></div></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Feb 18, 2019 at 3:30 AM Cecil Bearden <<a href="mailto:crbearden@copper.net">crbearden@copper.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<p>The thermal conductivity should be nearly the same. My Belarus
has a great heater at 1000rpm and above. If I drop below 1000 it
is not so great. I spent about 3 days in 20 deg weather pushing
and spreading shale for some roads around the homestead here...<br>
Cecil<br>
</p>
<div class="gmail-m_4553346302444758076moz-cite-prefix">On 2/17/2019 4:45 PM, Jason wrote:<br>
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<div dir="ltr" class="gmail_attr">Amsoil also makes a
propylene glycol antifreeze. Its heat transfer abilities are
better than ethylene. </div>
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<div dir="ltr" class="gmail_attr">Good in high temps but not
so great in the winter because at idle the heater output at
idle was nearly non existent. </div>
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<div dir="ltr" class="gmail_attr">Jason </div>
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