On a modern automotive engine, if the system is flushed with water, is it safe to use regular non-OAT ethylene glycol coolant and then continue to replace it at the defined interval (2 years for regular)?
For cases where it is impossible to find the information from manufacturer etc.
Specifically, if factory fill was an OAT product, do we lose anything other than the extended service period by switching over to a conventional coolant?
I'm not so sure about silicates and phosphates as this information is missing from the coolants available to me but I am also interested if this is important.