So here we are, five days later, starting at 8.08 with the mixed Prestone Cor-guard sample, the pH is 8.06, essentially the same.
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pH of some coolants
- Thread starter Snagglefoot
- Start date
or the water is anything but pure
But he said it doesn't taste like vinegar, and with all the post-processing he's apparently doing I'm going to postulate the pH isn't 3.0 or lower per his measurements.
This is all interesting, but what is important is that the chemistry of the coolant is such that it maintains that slightly basic pH (power of Hydrogen) for a period of time without having to start out as highly basic. This is that others meant when using the term "buffered". It would be just as bad to be highly basic as it is to be highly acidic.
A more meaningful test would be to put that coolant into use and measure the pH over time to see how long it takes for the coolant to reach a damaging level of acid pH.
A more meaningful test would be to put that coolant into use and measure the pH over time to see how long it takes for the coolant to reach a damaging level of acid pH.
Ok. Let’s open this up for pH numbers for actual coolants in service.
I’ll go first. 05 Ford Taurus. Two year old Prestone with Core Guard with what might be 60 % coolant mixed with distilled water. One pic of it in the antifreeze tester ( around -45 F). The pH is 7.94.
I’ll go first. 05 Ford Taurus. Two year old Prestone with Core Guard with what might be 60 % coolant mixed with distilled water. One pic of it in the antifreeze tester ( around -45 F). The pH is 7.94.
Now for a 2008 Chev Suburban with two year old Prestone Dexcool. It too is mixed at over 50% coolant. The pH is 8.28.
Looking forward to the 6 year results!
Excellent results. Both systems are essentially unchanged.
Inshallah!
