Thanks Matt! All was good zipping around town today. I think it was the southward climb on the Grapevine grade combined with 100+ temps, plus a full car and a partially open Thermostat.
I'll take it easier on the return trip over the more gradual climb from L.A. to Bakersfield. I'll swap out the Thermostat upon return to Sacramento.
Thanks for responding! Appreciate it... Rich