Yeah, I guess it's correct that Peak Global Lifetime is compatible with all other antifreeze products. That's why the word Global is in it's name. I didn't ever find it available to me locally so I went with good ol' Prestone from my local Wally World. That's why I was so careful to flush the system as completely as I could to get it to all water before draining and adding back a couple of gallons of Prestone concentrate.