That could be... My research into it was in 2001 when I bought my '91 Corvette that someone had put Dex-Cool in. I read a lot about it and decided to replace the Dex-Cool with good old Prestone. Took a lot of flushing to get rid of it, but I think I was good to do it.
So... Everything I know about the subject (and a lot of others LOL) could be dated.
Still.... I think I would use something else besides the Dex-Cool.
The last place I worked before I retired, we got into a major warranty related hassle with GM over the crappy Dex-Cool. We had a mixed fleet of vehicles that were mostly low bid, so we had GM, Dodges, Peterbuilts and Ford Trucks, everything from 3/4 ton to class 7.
One of the Diesel engines in a GM class 6 truck went in for a warranty replacement of the water pump. The good folks at the dealership pulled the water pump and found the housing and the pump severely eroded due to corrosion of the aluminum parts on a truck that had only 56k. Dealer service department wanted to know if we had substituted and other type of antifreeze. Checked the service records on this 6 month old truck and told them no, they had done all the service work to maintain the warranty.
After some head scratching and complaining they replaced the water pump and housing. Two weeks later it went back for a leaking radiator, same issue, dealer found bad heater core as well. They replaced them both. About a month later the engine blew, cause determined to be severe erosion of the block and head resulting in a head gasket failure.
As we had 5 of these other trucks, My curiosity was getting the better of me, so I ran test strips on each of them for the coolant.
Found four of the five to be out of spec and in the corrosive zone. Called the dealer. They did not believe me. So I told them, well, it is your call, do you want to someday soon replace everything under the hood or do you want to send somebody out to to check. They declined. Two months later another truck went in for an engine knock. Blown head gasket, motor beyond repair.
I told the dealer service manager that I thought it was a coolant issue, he replied it was a metallurgy problem with a bad batch of engines. At this point I sent out a coolant sample from the 4 remaining vehicles to an independent testing company, all came back corrosive and degraded and all had less than 50k. Sent the results to the dealer and asked if we could change the coolant to a different type, answer was a resounding, "NO" you will void the warranty. They third truck went in about a month later.
Dealer said it was imperative to send in all remaining vehicles for cooling system service. They replaced coolant with more Dex-Cool. I kept running test strips, just because I am an *******. Took 3-4 months to go corrosive again. Dealer was more humble this time, replaced all coolant with standard antifreeze and no further problems. Do not know if they ever told GM.
Dave
Folks should NEVER underestimate the powers and abilities of a good *******. 
