Dot4
Dot4 fluid can be used and mixed with dot3 brake systems. If your brake system calls for dot4 fluid, you can not use dot3 fluid in the system, regardless of being only dot3 or mixed. Dot3 system = either dot3 or dot4 fluid, or a mixture of the two. Dot4 system = only dot4 fluid, and NO dot3 fluid.
DOT3 or DOT4
DOT4 or DOT5
Not a problem at all.Not a problem at all.
dot3 or dot4
Dot3 or Dot4
Dot 3 or Dot 4. and if manual the clutch fluid is the same as the brake fluid (Dot3, Dot4)
DOT 3
Yes you can. Simply put, DOT4 is a premium version of DOT3, and they will mix. A lot of newer vehicles spec DOT4 in the brake or hydraulic clutch systems, so check to see what your specific application calls for. Quick side note: DOT5 brake fluid is the one that WILL NOT mix with DOT3 or DOT4.
According to the owner's manual, the recommended brake fluid is DOT4, or DO5.1 that is also mixable with DOT4. Do NOT use DOT 5, it contains silicon. DOT 5.1 does not contain silicon.
Either is OK
The 4th revision of the specification.