Your oil cooler is right on the edge of being out of spec NOW

So when you do a bunch of flushing it might put it over the edge you wouldnt be the first to have a flush & plug a Oil Cooler

Id flush it Odds are it will plug Filter the Gold throw it back in take in let them change the Oil Cooler and stick the ELC coolant back in it

I went with Final Charge CAT EC-1 Silicate Free ELC my coolant filters been lasting longer with ELC than Gold FWIW