All the Cat additives I have seen are SCA2 and SCA4 additives, which are not what HOAT needs.
The same thing with coolant filters, I haven't been able to find an additive filter for HOAT.
Cost on the Penray NF2091 is $49. 00 not much cheaper than doing the coolant change???? but lots easier and a lot less hassle than changing the coolant
As always thanks Mike for giving us another way of looking at things.
BIG
I am going to be installing a coolant filter coming uop this winter with the first, overdue flush on my 2005. I was going to use the Donaldson ECF4085 with NO SCA additves, but would definitely consider one of these since they claim to be compatible with the HOAT G05.
Maybe if enough of us show an interest, Genos Garage would want to carry them!!