What advantages are there to painting the inside of the block?

MOPARMAGA said
I tried draining 20-50 out of my oil pan on a 70° day and it barely came out

Straight 30Wt is worse, I have switch to VR1 10x30Wt oil in my race motors now and either 0w20 Wt. or 5W20Wt in my daily street drivers depending on the time of the year I am changing it for