Interestingly, I am the guy that wrote up that post. I need to mention here that the problems with Dexcool are noted not only by myself but by GM mechanics who have had current issues with GM Dexcool based products. GM does not use proprietary alloys that chemically are vastly different than the rest of the world. Coolants are spec'd. by engine manufacturers and in the case of GM serious mistakes were made. Reformulation has helped some but still does not totally correct the problems. Inherently the G-05 standard and the Cat ELC-1 standards are superior to Dexcool and both of these are used worldwide according to the Zerex reps I talked to.
Originally Posted By: Donald
No date on the writeup. Maybe old info? Certainly Dexcool has had its problems, but its not as straight forward as the writer suggests. In a vehicle designed for Dexcool its the right coolant. In fact its probably best to keep the type of coolant that came with your car to begin with. Worst is the AMAM stuff (Dexclone) at Walmart. Not saying to use only coolant from the dealer. Thee are many types of coolant available from Zerex. If you have an old vehicle, you would be safe moving up to Peak Global or G-05 (with a water flush).