If you put DOT 5, the pure silicone stuff in there, you'll gunk up whatever few good parts you've got left, and will have to replace them as well. System was designed for DOT 3. 3 and 5 are not compatible with each other. I'll echo what was said, for your sake, and the others on the road around you, make CERTAIN your brakes are fully functional before leaving your driveway under its own power again...the life you save may be your own.