I found HOAT but not POAT on this page: https://irontite.com/a/26-understanding-the-different-antifreeze-types-for-your-car and Toyota style is described as “red” and OAT (no P). they’re coolant designations btw, for anyone else scratching their heads.
This page also mentions the regional differences that relate to compatibility with the water supply in different regions. Coolants 102: Organic Additive Technology Variations Of course, that's something Toyota can avoid dealing with by selling SLLC premixed. It's not only about convenience: they also get to control the water in the mix.
Or specify distilled water for mixing? It would be good to have readily available full-strength Toyota Super Long Life coolant, specifically for instance where you've flushed out a contaminate, say a stop-leak product, and have a drained system with an indeterminate amount of residual water.
I found POAT here, was wondering if #3 was the intent: Urban Dictionary: poat which dovetails with #1 here: Urban Dictionary: Hoat Urban Dictionary: goat
