Full heat city driving 188.6F
No heat city driving 188.6-190.4F
Full AC city driving 188.6- 194F
Full AC at light 197.6F (highest temp)
No air running at light 197.6F (highest temp)

After two test runs ~20 miles much better than-

Full heat city driving 206F
No heat city driving 206- 212F
Full AC driving 204- 208F
Full AC at light 206- 210F

I did see higher numbers with the old stock t-stat right during the Flush treatment followed up by another flush. The debris must have caused it noticed the debris in the transparent pan- dark black granular like sand and gray dirty water. The Flush was a combination of Peak Flush, White Distilled Vinegar and Cascade with Dawn liquid detergent.

Once the system was flushed 3X including running a hose in the top radiator exiting the bottom until clear and adding the PEL500110 soft spring I immediately got better numbers consistent on two test runs. Still running full distilled until the weekend which will be the final flush adding the green anti-freeze.