NO! DONT MIX BREAK FLUIDS UP! USE WHATEVER IT SAYS TO USE!
I had a '99 Dodge Ram Pickup, I took it in for a brake job and all was well. After about 8 hours the truck would not move! Turns out the guy at the garage put the wrong brake fluid in it and the new fluid and the old fluid had chemical reaction and swelled all the O-Ring seals in the entire system. The entire system had to be rebuilt! We are talking new wheel cylinders, new master cylinder, rebuilding the calipers, and the lines had to be all disconnected and blown out. So don't mix you fluids!