brake fluid

[springers97]

Can someone tell me why there is a need for a dot 5 instead of using dot 3 or any other?

 

[glider]

Dot 5 is a silicone and dot 3 is a glycol base as is 5.1, they do not mix and the proper fluid should be used in the system or you will contaminate the system requiring a complete rebuild. Always check on the master cylinder cover to see what belongs in the system.

 

[Vibratinharley]

Here are some advantages to silicon brake fluid over conventional polyglycol brake fluids.
It is permanent, doesn't absorb moisture, doesn't boil, it prevents corrosion rather than causing it, it will not damage paint if it is spilled on the paint and it helps lubricate seals and other components in the brake system.

One thing I learned about silicone brake fluid in my experience with race cars is that it compresses more than regular brake fluid and can give your foot pedal and brake lever a different feel if switching from glycol based.

Lots of benefits over DOT 5 as opposed to DOT 3.

Nuff Said

 

[springers97]

thanks for you help, it is really appreciated