The other day my friend helped me install the front pads, rotors, and legend calipers on my car. I did the oil change and transmission fluid change. Used the Honda DW1 fluid. I asked the guy at the parts department and he said he didn't know too much about the fluid but it seems like it's just Z1 but just relabeled. However, when I was pouring it in my car, it wasn't a dark cherry red but more of a shiny cherry red so maybe the formula did change a bit. The car's at a shop cause apparently I found out my master cylinder completely failed after in I installed my new front brakes so I replaced that. The rear had a stripped screw so I couldn't get the rotors off so I had the shop replace my rotors and pads with the parts I supplied. Can't wait to get it back later today!