Officially, they won't admit liability.
Unofficially (i.e. within the Fiat Group and as advised to official dealerships through service bulletins) the GI/R is the correct fluid. There is also a revised reservoir.
Quite honestly the situation is scandalous.
My car has never been out of the AR network since new. I have been prepared to pay over the odds for peace of mind that any manufacturer's fault would be picked up and dealt with as a matter of course and with some good will, even if out of warranty.
Yet the fluid issue was never picked up or addressed at any service until it developed the shuddering and groaning symptoms last year.
I showed the garage the various threads on the fluid/reservoir issue (after they tried to convince me it was the rack) and wanted me to meet the entire cost of replacing the reservoir + filling with the correct fluid. I made clear my displeasure at a) Alfa turning out cars from the factory with the wrong fluid, b) the network having not picked up the fluid/reservoir issue, and c) being expected to pay for this combined incompetence.
They eventually spoke to ARUK who agreed to meet at least part of the costs on the basis that the car had never been out of the network (although I had to provide them with the service history, which I would have expected they'd have in the first place). A small victory, but another example of ARUK and the dealership making ownership such a painful experience.
At least the problem has gone away. Now to sort the puddle of water in the driver' side footwell after heavy rain, poor MPG, glow plug failure, ABS failure, excessive front tyre wear... Oh the joys of Alfa ownership. But still love my 159.