I myself have used only clear color DOT 4 or red DOT 3. Dot 3 cannot be mixed with Dot 4. If you do it will eat up the hydraulic seals. Then no more brake!!! Trust me on this.

For more brake Dot rating read here

http://www.motorcycleproject.com/motorcycl...brakefluid.html

http://www.stoptech.com/tech_info/wp_brakefluid_1a.shtml