I popped the caps open to check fluids yesterday for the first time before a day-long trip in the Woodward Dream Cruise (2.0) meet up. My clutch fluid is NASTY.
I have under 6k miles on my 2019, and the clutch fluid is dark brown. Looks like used motor oil. Can't be good for the clutch (although, i'm not manual-trans savvy). I believe the owners manual says to change it every 30k miles, but i’d definitely recommend looking at it before that. 90% of my miles are highway too, as I drive about 70 miles a day for work, 68 of them being highway, so i'm not hard on the clutch.
Sometimes shifting into third gear feels a lot harder than it should, i'm wondering if this is possibly why. I haven't changed the fluid yet, gonna do it today. I'll post back results. The reservoir also has crud in it, like a thin black layer of something at the bottom inside.