What aftermarket antifreeze do you use in a 1997 Ford Explorer?
Read the owner's manual and buy any antifreeze that meets the requirements listed. The manual calls for Ford Premium Cooling System Fluid, but any water/ethylene glycol based antifreeze solution should be OK. Use the regular green antifreeze, mixed at least 50/50 with water, but never over 70% antifreeze, or just buy it pre-mixed. Make sure it is safe to use with aluminum engine parts. I use Prestone.