I can confirm that the GR86 do indeed show a numbered oil temp. It was one of the reasons I picked it over the BRZ aside from the bumper.
Some observations:
Highway cruising temp in 6th gear is 193F ish.
Highway cruising temp in 5th gear is 205F ish.
Keeping it above 5k rpm on the highway for 15sec raises temps to 224F ish.
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