FL-22 coolant

Just sent my wife to a Wayne Mazda dealer to get me some engine coolant since they mentioned that they have it for MS6. She comes back with the FL-22 extended life coolant in her hand. I remembered this from the manual that it should be used on vehicles that have the fl-22 printed on or close to the radiator cap. My guess is that I would have to drain the whole think to use this. What is your opinion on this? No Mazda dealer in my area has regular Mazda coolant or non fl-22 one. Ramsey Mazda send me to local Walmart, yet again, to get my parts there. Plus, does anyone have the FL-22 on their cap?