For 1993 Xedos 6 engine it’s necessary to get normal temperature balance. Only exact type of antifreeze will suit Mazda Xedos 6 cooling system. To maintain cooling system you need 7.5 liters of Red coolant. Before choosing fluid note that engine code KF1 and volume of 2.0 were installed to your car in 1993. Make sure you service system at Mazda with installed 2.0 engine correctly.
If you choose other than Red coolant or use less than 7.5 liters, you can’t expect normal work. Use your 2.0 engine longer in 2000 Xedos 6 by keeping these rules. So better use Mazda’s advice for servicing 1993 Xedos 6. It’s obvious that every KF1 motor needs good service as stated by Mazda in instruction.