An ohmeter to test PH is a new one on me, but I do believe the PH level and the continuity may be related.
If you google antifreeze PH test, you will find a lot more about the subject. One article mentions that automotive parts stores will sell test strips. Apparently, water is fairly PH neutral at around 7, and AF is around 10. Mixed 50/50, the PH goes to about 8.5. The PH adjustment that the articles mention is to bring it back to around 10. Seems to me with the heavy trucks, we changed the coolant filters, and could adjust the PH through using a differently rated filter.
I have always preferred the common green A/F. My wifes car (an Oldsmobile) requires the yellow stuff called dexcool, and that is touted as long life. It is also relatively expensive.
I would venture to guess that you guys from the Southern Hemisphere don't have a lot of antifreeze experience. Up here it is mandatory.....a night outside with just water and you will crack your engine block.
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