Brake bleeding/flushing question

[tooch]

I'm going to be fitting my big f*ck off brakes up soon, and will be doing a full fluid change too, as the stuff in there now must be 4 years old. I want to change to some nice DOT 5.1 like Motul or similar, but obviously want to avoid bleeding it dry as I have ABS. So my question is, is it ok if the DOT 5.1 mixes with the DOT 3 or 4 that's in there now, while i'm bleeding it out? I was planning to just keep topping up the res, and bleeding until only the new clean fluid comes through.

Is it going to destroy anything if it mixes?

[Squid]

Tooch - we did that on John's mini, we found for a complete change you want to use a vac pump as there were pockets where the old fluid didn't clear out, and it was still spongy

[WDE_BDY]

My advise, get it driveable on cheap dot 4, then take it to the professionals. Its a bugger of a job and for the time you spend stuffing around (especially with ABS) its just not worth it. cost me NZ$45, probably cheaper if you are supplying the fluid yourself.

Callum

[tooch]

Thanks guys

Callum, that was my other plan, I have a bottle of DOT 4 here that's unused, so I was considering doing that and then dropping the car off at the mechanics directly across the road from work so they can do it for me while I work