Ok. I was just curious because I hate the stuff. I had a chevy s10 and every seal was eaten by the stuff - or so says the mechanic who worked on it. Had the same issue with a 2000 Grand Am. Coolant went from that nice color dex-cool to a disgusting brown in less than 20,000 miles... rust.. No oil in coolant or coolant in oil..... but a mess no less.