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I have no problem using SuperTech DOT4 or Prestone DOT4. You can buy DOT4 that is 5X as costly, but it does nothing different than any other DOT4.
https://www.autozone.com/brake-and-power-steering-fluid-additives/brake-fluid/p/pentosin-dot-4-brake-fluid-1-liter/579851_0_0