Toyota used to say to their customer the same way that Porsche say about their coolant. For over a decade, Toyota was the only company that use the pink coolant that does not contain silicate, nitrate, or phosphorous. That has all changed when people just use over the counter coolant that does not contain those three chemicals w/o any effect.
Honda always recommend their ATF for their transmission, people quit using them because they believe it causes damage to their V6 trannies.
What I'm saying is, do your research and stop listening to car makers.
For porsche coolant, just get any coolant that does not contain silicate, nitrate, or phosphorous. Try Zerex for asian car that is pink color.
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