The MAIN reason for this, was to see what a 5W-20 oil would do in this engine. Looks like lead wear went UP.
Also, my coolant leak, present in the last 2 UOAs, is "gone" (for now).
This is a 1998 Chevy Lumina, 3.1L V6, 169,930 total miles. Oil was Mobil 1 5w-20, filter was a PureOne, OCI was...