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Keep in mind we are not concerned with engine bearing life at 185 degrees it's when you're pushing the engine and seeing 230+ degrees. If you can't get your oil temperature up it's probably due to not running a thermostat in your oil sandwich adapter.
I do think though in colder climates and not during track season the demand for oil viscosity that keeps oil pressure high enough is less critical. So for sure drop down a little for winter but A) don't run an oil cooler without a thermostat and B) run an oil weight that is appropriate for the pressure you record during aggressive driving.
I'm all for 80-90 psi if you can get it and for a Subaru engine 140 psi at cold start just isn't abnormal but.........run only what you need. If you need to partially block your oil cooler in the winter then do it. We even see track cars that have to block their radiator during the colder months.
I've had to run 50w to handle the oil pressure we are loosing due to oil temperature and I doubt even in the winter I'll drop less than 10w30 for street use. I would never race a 400+ whp FA with less than 40w.
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