For reference, I used to run 20-50 in myb383. Took forever for the pressure to come down enough that I felt comfortable driving.

Dropped to 10-30, better warm up, no difference in pressure.

Dropped to 5-30, Even better warm up and still no drop in hot pressure.

I've considered trying 0-20. It's just an oil change and if it doesn't work drain and refill.

I have a high volume pump and deep Moroso pan but only run 6 qts.