HOAT coolant instead of OAT

Nope you can drain it add a little of the proper fluid let it push out all the old fluid fill it with the right stuff and forget about it.

 

Most all water in this system passes through aluminum predominantly there may be some other metals in the thermostat itself but it's pretty small. The passage through the inverter is through an aluminum block which is the whole body of the inverter The water doesn't pass through or touch any of the copper parts in that inverter It just draws the temperature away. I think you'll be okay I do know people who have put crappy coolant in the vehicle and the run it well past 300,000 without any problems yeah seriously I even know people that have transmission fluid that would never fly like from regular CVTs I'm not sure what bottle they even used but it's not approved for running an electric motors and as far as I know the cars are still on the road but I wouldn't say it's a good practice.