After watching this, I'm not too sure of the type of coolant I want in my Volt.....
https://youtu.be/PbX4CuE8auY
Any reason I can't flush and fill with the green stuff?
LOL this is about the 100th time we've seen this sort of BS posted on here. Give it a rest. lol
Yes, there's a very good reason NOT to do what you're suggesting.
Doing so may damage the cooling system, create high voltage loss of isolation issues and void your warranty.(including the Li-Ion battery)
While that should be "nuff said" let me continue...
Having worked 20+ years now, nearly every day with cars and trucks using Dexcool exclusively, I can say that video is total garbage. (as was the class-action suit from the 90s that GM settled on years ago for that matter)
Clearly that 20 year old car had a coolant contamination of some sort (engine oil?) and was never properly maintained.
Dexcool is still ethylene glycol just like the old green stuff but with an additive package that makes it less reactive to certain metals (especially aluminum and aluminum alloys) less corrosive to modern OEM rubber coolant hoses (not necessarily to cheap Chinese replacement hoses) certain pump seals, AND will also increase it's service interval up to 5-years 150,000 miles.
The gunking in that video really had nothing to do with Dexcool other than it being chemically intolerant with whatever it was coming into contact with or whatever foreign substance was added to that cooling system (to me it looks like perhaps some sort of stop-leak, like Bar's) Notice they don't even show the drained coolant that was removed from that system in that video so there's no way to know what the visual condition was like in the first place.
All too often often regular green coolant (or worse dirty/bad water) gets added to a "long-life" coolant car (many other manufacturers are using something similar to Dexcool) and it gets discolored and starts chemically reacting AND THEN it doesn't get replaced at the "old" 50,000 mile interval.
An air intrusion/caviation due to a bad seal, head gasket , rad cap, reservoir check valve etc can also create a contamination, but again that's just improper maintenance and/or sub-standard repairs.
Additionally the intake gasket in that video clearly had been replaced before as that was NOT an OEM GM gasket or proper silicone sealer being used, (yes, those intake gaskets on the 60-degree V6s were infamous until GM finally redesigned the seal ~2001) That seal is clearly aftermarket and may have been introducing EGR gases and/or engine oil into that car's coolant. (seen it lots on that 2.8/3.1/3.4 V6)
Prevent incorrect non Dexcool coolants or unknown additives from being added to your car and service it as per the owner's manual and your Volt's cooling systems will outlast both the car and the driver.
WOT