Originally Posted by goldduster318
[quote=jcruse64]I read a recent Mopar Action article by Rick E, and he'd recommended going over to DOT 5, after doing a full flush (DOT 5 can't be with the earlier grades apparently). Is he right; if you're already doing a system flush, is it better to swap to 5?


No, don't do it, its a different chemistry fluid. It's an absolute no-no on an ABS/ESC vehicle especially, Keep in the gylcol fluids (3/4/5.1). New systems only if paint is more important to you than brake pedal feel.

DOT 5 is silicone based, but from my understanding they can be mixed with DOT3 &4. The DOT won't leave it up to the end user to make that call whether they can be mixed or not, they are compatible correct? Please elaborate on pedal feel. Does the DOT 5 compress more than the glycol based 3 and 4? On a fresh system why would it be a disadvantage to run 5?

Jeff