jim wrote:
vw sump plug slow drippy leak....

I believe these vw plugs seal on the thread rather than the
"crushable/copper washer against the sump body" style....

This one drips even with a new sump plug.

Much goggling warns of stripping threads in sump body through
overtightening and dropped/damaged sump plugs wearing the
threads of the sump and causing the leaks...

Any tried & tested solutions to this?

Ultimately a new sump is indicated, but until then anything worth
trying?

TIA

Try PTFE tape as a seal?