I am using liqui moly dot 4 and no issues so far.
Of course I changed the oil together with the brake lines.
Regarding brake-lines, I have got the Z1 (Premium Stainless Steel Brake Lines) and I am very satisfied.

So Motul RBF 600 on a daily street car, still overkill? I got a 2 pack for $32 and changed my fluid the other day. Should I go with 1 or 2 years in between changes and possibly switch to DOT 3?

The Motul is good. It's not over kill. The Dot 3 isn't enough. For a DD, the 2yr changes are ok.

If you are using Motul RBF 600 or 660 that is a race oriented brake fluid and will absorb moisture faster and will require to be changed out sooner. For a DD I would change out the brake fluid once a year or at the longest every two years. I would definitely research what brake fluids if you are asking these questions before making a selection on what brake fluid that would be best for your Z.

:iagree:

I prefer a 6 mon to 1 yr interval max for the RBF 600 fluid. Motul 5.1 is an excellent DD option, less expensive, and better suited for a 1-2 yr interval.