Changing brake fluid

I want to remove brake fluid from the reservoir with a turkey baster
and then refill. This is a quick fix low cost alternative to getting
it done at a garage. Is it worth the trouble?

 

No, because you still have the old fluid in the lines. For a complete
change, you need to flush the lines too.

 

Good point but will the new fluid just sit in the reservoir or does it
circulate and mix in with the old fluid?

 

It'll mix some. But since the fluid never really moves that much, it'll
take a really, really long time to mix well. Do what you suggested with
the turkey baster, then turn the can of new brake fluid upside down on the
master cylinder, and gravity bleed from each wheel until clean fluid comes
out.

 

These valves (<https://www.speedbleeder.com/>) make bleeding the
lines VERY easy.
Usual disclaimers.

S25

 

OK, but it looks like the wheels have to be taken off the car in order
to get the job done.

 

That's normal for brake work.