Coolant Replacement
I'm replacing the coolant on my '65.
I'm thinking about using Amsoil passenger car/light truck Antifreeze & Coolant.
Comments, pro or con?
I'm thinking about using Amsoil passenger car/light truck Antifreeze & Coolant.
Comments, pro or con?
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Re: Coolant Replacement
Stephen,
I think you'll find the consensus is a 50/50 blend of Zerex G05 and distilled water. I, personally, know nothing about the Amsoil product.Leif
'67 Coupe L79, M21, C60, N14, N40, J50, A31, U69, A01, QB1
Top Flight 2017 Lone Star Regional -
Re: Coolant Replacement
Back in the day there was pretty much only one type antifreeze product type... GREEN.
Now there are more than a handful. Nearly all are ethylene glycol based, and the differences are the corrosion inhibitor technologies, which are divided into three different classes - inorganic acid technology, organic acid technology , and hybrid organic acid technology, and there are different formulations within each class.
When Dexcool (OAT type) first came out I was a big fan, but then discovered that it may "leach" lead from solder joints that can weaken the joint. That led me to do considerable research, and I decided that Zerex G05 (HOAT type) is the new "universal" antifreeze that protects all cooling system materials including solder. Modern OAT types are not formulated to protect solder because modern cars don't have soldered radiators or heater cores. They're all aluminum with plastic side tanks.
G05 was originally developed and patented jointly by Daimler-Benz and BASF back in the eighties. It was OE in 80s vintage Mercs, and then became factory fill in all Chrysler products after the merger and Ford also picked up on it, but I don't know the current factory fill for any of the above brands.
G05 change recommendations by OEs are usually 5 years or 150K miles, but it you only drive a few hundred to a few thousand miles per year it's probably okay to go another year or two.
The old "green" (IAT type) provided good corrosion protection, but had a lot of silicates that precipitated out, eventually clogging the tubes resulting in a drastic reduction in heat transfer capacity. Brass cores with soldered side tanks can be "rodded out" to remove the deposits, but the furnace brazed aluminum radiators used in some Corvettes are not reparable because they don't have side tanks that can be removed and replaced to access the tubes.
On a recent trip to Walmart I was looking at antifreeze and saw a Prestone product that claimed 10-year life. I have no idea what the corrosion inhibitor technology is and have no plan to research it, but anyone else is free to do so.
So that's antifreeze for vintage Corvettes in a nutshell, but I have couple of questions for the OP.
Why are you interested in this product and can you explain the technology? Don't rely on advertising and marketing hype from the marketer. You need to present independent third party information.
DukeComment
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Re: Coolant Replacement
Leif, Duke & David
Thanks for your quick responses.
I was interested in this product because a Chevy mechanic suggested using it.
I cannot explain the technology.
I will be using the Zerex G05.
Thanks again for your informative responses.
StephenComment
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