dot3 and dot4 - which is which?

[1D4LV]

hi,

i am about to change my brake fluid and my clutch fluid.

i'll be doing this on my own, because i know what needs to be done here.

question now is, i don't known which fluid i am going to use. its not right to mix dot3 and dot4 right, so i don't know which i am going to use.

dot 3 and dot 4 are compatible, dot 4 can handle higher temperatures. in a dot 3 system you can use dot3 or dot4, but if your system requires dot4, thats all you can use. dot 3 boiling point is 369 degrees where dot 4 is 446 degrees. yes your brake fluid can get that hot. when water and other contaminants get in your fluid it lowers the boiling point even more. i suggest flushing your brake fluid when you do a brake job.

so going back to your question, what is your braking system? DOT3 ba o DOT4? Kung DOT3, use DOT4 na.