coolant compatibility?

[the phantom]

I have to replace the radiator fan switch in the wife's '95 1.6 Polo and clean or replace the expansion tank at the same time

original coolant is G11, but I understand G13 is compatible with both G11 and G12 systems, is this correct?

[Pristle]

Penrite Blue OEM should do the trick. It's rated at G12+ or VW TL 774-F.

Comes in concentrate and premix options.

[the phantom]

thanks, that's helpful