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Originally Posted by Duke2.6
I've never experienced any sludging with Dexcool and I've been using it in all my cars since '95, but am in the process of switching all but the MR2 to G-05.
GM claims in several TSBs that sludging and corrosion is the result of running with low coolant over extended time/mileage intervals. Apparently some of the components in Dexcool can oxidize if there is a lot of air in the system.
My opinion is that these Dexcool lawsuits have little merit.
Duke
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..... well, probably. Nevertheless, I note that my daughter ran her Cavalier with low coolant quite often during the summer because of a tiny block leak (which btw a 'leak-stop tablet' fixed nicely) and wouldn't you know, I had to replace the leaking core in the fall. the car had about 150k km on it. Coincidence, possibly .... but maybe not
cheers