[91C2wrencher]

Ok, OK! Jeez... Thanks for all the responses. I'm aware of the pitfalls of not flushing the fluid, I've had a "soft pedal" at the track even after a full flush/bleed(that'll get your attention!). But the thing is, I've never given my other cars a second thought, not now, not ever before with any daily driver(non-p-car) I've owned and those systems seemed to operate fine for 5,6 or 7 years. My question was does "topping off the resevoir" w/o bleeding(after all I really don't like spending time wrenching on the Lumina-duh!) a better solution than just leaving the old fluid in? Does Brake fluid "circulate" around or would the newer fluid in the resevior just stay put and not get down to the calipers?