Coolant pH test strips, anyone trust them, use them?

I grabbed the Tundra used and the previous owner had several records for basic maintenance and generally tried to do the right thing. Even had the pan dropped on the trans which when I did it at 110k, was spotless. It's a 2010 4.6.

I'm curious if anyone trusts these pH test strips? I have SLLC but the weather is crap so I used a test strip to see if I can push this out until spring? It tested well. Is it newer or pushing 14 year old coolant Idk...

#coolant ph testing

 

It depends on whether your coolant uses an organic acid. Even then, that's for corrosion resistance. I don't know if pH can measure freezing or boiling point metrics.