Great pics there. Those motors take a lot of beating, your oil changes seem to be doing well.
I had a 1996 2.0 Golf 3 Gti and pounded that car all the way to 200k km, used FINA First 5w-50 (Grp 4) on 30k km OCI and it looked like yours inside before I sold it on...never added a drop between changes either...
SO much for VW being junk
VW's newer line-up is junk.
My dad had an '88 VW Jetta diesel, and that thing was an absolute tank!