Well we have seen so many problems with Dexcool that I won't use it and prefer to get it out A.S.A.P. I've become partial to the GO-5 that Ford & Chrysler use for anything aluminum,or The Asian blend for Toyotas and such.
Only problem I've seen with the GO-5 is it's clear and makes it a little hard to find leaks while the Asian blend has an orange tint.