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post #1 of (permalink) Old 12-12-2007, 03:07 PM Thread Starter
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G-05 coolant

I've always used a 50/50 mix of the green stuff. But this Zerex G-05 says I should use the range of 50/50 to 70/30. While I don't need extra antifreeze protection, would a richer concentration help with lubrication, corrosion and boil over?

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post #2 of (permalink) Old 12-12-2007, 03:30 PM
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According to their website, http://www.valvoline.com/products/zerexg05.pdf, a 50-50 mixture freezes at -34 and boils at 265, A 70/30 mix freezes at -90 and boild at 277. So yes, it does offer better protection, but I can't imaging that you would need it where you are.

Nothing I saw mentions the comparative lubrication and corrosion properties of the different ratios, nor diod I see anything about the specific heat or the heat transfer properties. But there is an "Ask us" page here: Valvoline.com - Contact Us Why don't you pose those questions to them?

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post #3 of (permalink) Old 12-12-2007, 04:05 PM Thread Starter
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Okay Jim I asked them.
The older I get the colder it feels around here, but I guess the freezing point of my plumbing and the Jeep's are different.

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post #4 of (permalink) Old 12-12-2007, 04:34 PM Thread Starter
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Valvoline's response:
"The richer concentration will just give you a lower protection temperature."

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post #5 of (permalink) Old 12-12-2007, 09:04 PM
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This is what I have found out, I quit using a mix approx. 35 years and countless vehicles ago, why?, cause I found out that the water pump bearings get their lube from the anti-freeze, and any cantaminates, anything but something like distilled water has all kinds of stuff in it to corrode your radiator and destroy your bearings. Soooooo I haven't had to replace any water pumps in over 35 years, my radiators are alot cleaner too. Adding water and then heating it leaves calcium and other deposits on the inside of your radiator and heater core causing problems for you later and I'd rather be building another ride or whatever than replacing parts, course running an 8 it sure warms up the cab faster in the winter, but when you're rollin in the summer it pulls the heat away from the engine faster too. This is only what I have experienced first hand and I'm just passin it along, hope it helps out.

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post #6 of (permalink) Old 12-13-2007, 07:28 PM
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Larry, from my year in this field 50/50 works for most. Colder areas demand a 70/30 mix. Anything past that detracts from the ability to do the best heat extraction for the engine. Around me I always use the 70/30. I would doubt that you need more than 50/50 where your at. (my .02.......use at your own risk...if you get down to no lower than the 20*'s then 50/50 is fine..........below that 70/30)

Actually for a readily available product straight water works best. Cons are freezing and low boiling point. Thats why alcohol (first) and then glycol were added to raise/lower the extremes of what an engine needs.

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