Anti-freeze/coolant question (green, orange or pink)

[RM]

As far as I know, there are three different types
of coolant, the common green stuff, Orange GM Dex-cool and
the fluid made by Pentosin, which is brilliant pink in
color. I know that common green cannot be mixed with
dex-cool, as an acidic condition will result. It's this
pink stuff that is being used in some newer European cars,
from a manufacturer called Pentosin from Germany. They
claim the stuff is 'lifetime' as opposed to Dex-cools
'extended life' formula. My question is, can one mix
dex-cool with Pentosin? I have and anti-freeze recycler
that only holds one brand of coolant. I am using the common
green stuff, but would like to switch over to a coolant
that is more agreeable to a variety of cars. Any thoughts
on this?? Thanks!!

Rolf