Quote:
Originally Posted by X5Cat
I mixed a little of the Dexcool I had on hand in my garage 50/50 with water, which the label says will handle down to -34F. Stuck in my Prestone brand hydrometer type tester and it read -20F. So, maybe that says something about variation in the readings obtained with the tester for one type antifreeze when testing another type?
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It says more about the accuracy of the hydrometer.
There are two bases for antifreeze, propylene glycol and ethylene glycol. As long as it is an ethylene base the hydrometer works, with the usual hydrometer limitations on accuracy.
The differences in specs are related to additives/chemicals related to seals, aluminum components, etc. These differences have no impact on hydrometers.
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