Question about Amsoil Propopylene Glycol Coolant

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The question:

quote:

Does Amsoil Propopylene Glycol Coolant contain water?

The answer is yes. It has water in the ingredients as all common automotive coolants do...this does not mean it is "premixed". According to the MSDS, it's 93-95% propylene glycol.

Common auto coolants have propylene or ethylene glycol, a bunch of various additives, and a small amount of water.
 
You can mix it just like any antifreeze up to 70%.

I have used it for years with great luck. I like the fact it won't attract animals/pets.
I also like the fact if a head gasket starts to blow it won't screw up your motor like ethelene glycol.
 
How is Amsoil's Propopylene Glycol Coolant different from Sierra Propopylene Glycol Coolant?

I had tried Sierra when it first came out in a 1984 Mazda 626 and noted markedly higher coolant temps, in the summer, than with EG coolant. At the time this was explained by the fact that the 626 had a marginal cooling system and the PG coolant was thicker than EG coolant.
 
I don't know the exact difference compared to Sierra. I know that Amsoil antifreeze is rated for heavy duty diesels, I don't believe that Sierra is.

I would assume that it has a more stout additive package. When I did research on the web a year or two ago it seemed like a lot of antifreeze companies are marketing the propylene glycol to the heavy duty truck market.

I have not noticed any difference in temp readings, but I would assume that a vehicle on the edge of overheating might be slightly more prone to overheating than using an ethelene glycol.
 
quote:

Originally posted by oilboy123:
I have not noticed any difference in temp readings, but I would assume that a vehicle on the edge of overheating might be slightly more prone to overheating than using an ethelene glycol.

Do you mean EG may give slightly lower temperature than PG antifreeze ?

I had some ideas to switch my Prelude to PG, but I am still hesitating whether or not PG will work better. The info is so contradictory. The only PG antifreeze available on our market is designed in the US by Lyondell and bottled in Europe by different oil manufacturers under their own names with reference to "Triguard" brand. Anybody heard about it ?
 
No I don't mean it gives cooler operation. It seems the same according to my temp guage which just has a needle and a range. No exact temp number.

From everything I've read EG has slightly better ultimate freeze protection over PG antifreeze.

This does not concern me because it never gets colder than about 15 F.
I would assume the antfreeze you mention should be OK.
 
quote:

Originally posted by Primus:
Do you mean EG may give slightly lower temperature than PG antifreeze ?


No. The car's thermostat will attempt to automatically modulate the coolant temperature within the limits of the cooling system. However, Propylene glycol is not as efficient a heat transfer medium as ethylene and di-ethylene glycol. Generally it shouldn't be a problem, but there would be less margin for error with marginal cooling systems in hot climates. Mixing to 70% PG in a marginal cooling system in Texas, New Mexico, Nevada, Utah, or Arizona in July or August would be inviting a boil over.

[ August 17, 2004, 07:28 PM: Message edited by: Ray H ]
 
If you're using this stuff in a critical hot environment (where presumably ultimate freeze protection is not an issue), then I'd just mix with a higher percentage of water. Water is the "backbone" heat carrying component of the coolant, so as long as you don't go so thin on the PG product that you nullify its anti-corrosion properties, you should be fine.
 
It is not recommended you run less then a 50-50 mixture of water and coolant.

A 50/50 mix of coolant and water will boil at 265 degrees Fahrenheit, at 15 PSI. If the ratio is less, the boiling temp with go down and could lead to loss of coolant over time.
 
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