Mini piston soak "to see what would happen" & thermostat swap. The car would take awhile to warm up in the morning & over-cool on the freeway during long downhills. I didn't think much of it since it'd only happen on cold nights, but then I saw it happen on a 110° summer day. Also thought "it's just a dummy gauge, so not an issue," but noticed it running cool while using Torque app. 23yrs & 357k miles...$6.39 from Lexus
. Got my monies worth
