>>28563700
well if you drive at 40mph, in 2nd gear, near redline, park it, and turn off the engine, it aint gonna magically cool down on a humid 95F day.
thats what the overflow tank is for.
I usually sit for a minute after driving hard to let it cool down. ive bad turbo timers in all my old shitboxes just for this reason.

this is the first time the miata has done this
I dont have an AC fan if that matters
i'll test the coolant. maybe its too diluted.
I didnt notice the temp go above half when it was running.