I guess I'm a bit more conservative. In a NHW20 (or Gen3 until real data exists) I would suggest that an early refresh of Type WS ATF at 30k miles followed by a second 60k miles afterwards (at 90k total). You could then consider stretching out to 90k mile intervals thereafter. I will do my next refresh at 240k ( the fourth at 60k intervals) miles G-d and my 2004 Prius permitting.
I like it and also combined it with the ZVW30 recommendation. I've already done one ZVW30 change at 5k miles and given the similar transaxle designs, I think this is an improved recommendation. Do an early change to flush out the left over manufacturing debris and sealant beads. Do a second change at 60k to get the residuals and finally 90k miles thereafter.
I will be doing a 15k change on my wife's ZVW30 in about a month. This is part of my new vehicle studies but the 5k sample was pretty definitive about the need for an early flush. Get the stuff out before the differential has too many chances to powder the left-over debris.
. . .
There is an individual doing testing of Redline ATF in his Prius and reporting the results on PriusChat. I do see a little CU in his Blackstone Lab test reports so I suggest sticking with the Toyota Type WS in the later models for now.
Good for him! Experimentation should be encouraged along with collecting empirical data.
BTW, I periodically check the Gen I forum and am pleased to see NHW11 problems are being competently addressed. The net has many outlets for Prius advocacy and it is kinda nice to go back to my 'Prius lab' work. <GRINS>
Thanks!
Bob Wilson