[Polishpat]

Even though DexCool says you can go 100000 miles/5 years without changibg it, I noticed that its common for DexCool to clump up and cause sludge inside of your reservoir. I made the mistake of waiting 5 years with my Malibu and I got a descent amount of sludge caught up in my lines, and when I got to flushing out the coolant system, it was the most horrific coolant I have ever seen........in fact I had to flush it out three times, to get absolutely everything out of it. Since then Ive decided that I will do the flush every two years, instead of having to go through that mess again.

~Pat