It's all I run!
See my sigline.

My oil pressure gauge tells the story... I'd keep it under 2000 or so until the engine gets to 170F, you'd be surprised how much thicker it is than 0W40.
At 185F, it will almost DOUBLE your idling oil pressure; mine went from 9-10 to 20 pounds.

(As indicated on an after-market oil gauge ... and not a really expensive one.)

I actually let mine warm up to at least 125F before drivign away, most of the time.