Quote:
Originally Posted by Charlie M. (UH & 002 owner/pilot)
Ummmm....yes, I am very happy with my post.
Pretty much ANY DOT fluid is cross compatible EXCEPT DOT 5.
DOT 5 "will work", but it is even MORE water hungry than others. I do not believe it is a seal issue, it is water absorption issue. Thus, race cars is fine, other uses, sucks.
Now, mineral based fluids vs. DOT fluids is a different matter. Thus my question.
Oh, and to accentuate this, if you have an old system that uses DOT 1, using DOT 1-4 AND 5.1 is fine.
Yes, I made a bold statement, I will do my best to provide GOOD relevant links to prove, not just me stating it. Say, within 24hrs?
|
Warning! General observations maybe present
Dot 5 is a silicone based fluid and is hydrophobic i.e doesn't absorb water. Dot 5.1 is glycol based and is hydroscopic i.e. does absorb water.
It's a PITA having the numbering system this way but it means that it's quick and easy (really?) to distinguish between the 2 types of brake fluid that meet the performance standard for Dot 5. Mix them at your peril
https://www.lubricants.total.com/brake-fluid-types
:-) Colin