You might want to read
Some of Porsche or BMW track day forums ie Pelican Parts, PCA, BMWCCA etc.
Again dry boiling point is worthless since once you open the can brake fluid starts to attract water. Wet boiling point is the most important. ATe Gold has a wet boiling point of 399 degrees. Do a google and see what folks have to say.
If you tow I would change the fluid every year.