and ...to add to the comments above:
keep your thermostat, faster you get you engine up to temp, the better.
Also, cold oil is at a lower viscosity like 5 in the 5w-30.
It will be trying to heat up all the coolant not just the partial amount inside the engine and heater core.
Normal op. Temp is around 12'o clock, mine runs at 1230 (east bay gets similar temps to your place ;-)
silvermazda ! we should meet up oneday oil change on me at the shop later J. sorry you wont be able to see my rx-7 nor my 10th ae on the picture. rx-7=ls7 10th AE fully built N/A 9K! you will see my new ride also a 1999 ae ITS A BEATER ,but im working on it still waiting for my setup from 949racing