Antifreeze

Dont mix the colors. It tirns to sludge

 

I wouldnt worry about it. Ive put whatever color was available in trucks. they are still running.

 

It probably had decent cool already. Should be fine.

 

Drain it out. Okay in a pinch, but will cause problems later if left in.

 

If you had red AF already, that’s dex -cool. No need to worry. Won’t hurt to flush, but not necessary if you added compatible A/F. Mixing red with green causes problems. Originally dex-cool was made by Texaco, I had it turn to jello after sitting for 3 months. Since then there’s been class action lawsuits against GM. I Recently switched back to “ Final Charge”. Seems the original problems with red A/F have been resolved. A/F like oil never goes bad only the additives get depleted or A/F gets contaminated