yeah, but i didn't know that until recently which is why i looked and found the crap

Red and Green make brown.

That doesn't appear to be dex mud...I had that same mud in my 89s coolant bottle too, not the same. But umm, since the picture isn't a very good one, its hard to judge, BUT, if you're getting ANY mud at all whatsoever, thats usually a good sign that the coolant is separating and wearing out and needs to be flushed regardless of what it is or isn't. As long as it doesn't look like the radiator in my 98

well that picture is only the bottle, and that was about a year ago...i checked under the cap last week and found the mud, it looks similar to the topic posted about a week ago of yours, just not to that extent