Can I Use Dot 5.1 Instead Of Dot 4

Can I Use Dot 5.1 Instead Of Dot 4. However, dot 4 offers a higher boiling point. Dot 3 vs dot 4 brake fluid

System Administrator's Guide Red Hat Enterprise Linux 7
System Administrator's Guide Red Hat Enterprise Linux 7 from usermanual.wiki

Glycol fluids like dot 3, dot 4 and dot 5.1 are actually designed to absorb water instead of separating like dot 5. As for the boiling point, we distinguish the following values: It does not absorb moisture.

System Administrator's Guide Red Hat Enterprise Linux 7

Yes dot 5.1 is compatible with dot 4. I heard they form a precipitate if mixed. Nope, dot 4 and 5.1 are compatible. It's compatible with dot 3 and dot 4 fluid.