I spoke too soon. 3700 miles in and there was a drop in level. Not enough to trigger a light and it seems slow enough now that I won’t need to add anything before the 5000 mile OCI I run on this thing.
The varnish in the engine doesn’t seem to have changed. But there never was any sludge. I’m not worried about the varnish. But, this is only the first of four oil changes.