whomp whomp whomp

The 20psi you mentioned (hot at idle) is fine. Standard rule if thumb is 10psi for every 1000rpm.

I would dump the straight 40wt. and go with a quality multi grade 10-30 (my preference).

I might or go 10w40 i went with a cheap autozone 10w30 before the straight 40 to clean out if any water was left in the motor and it was like water when i drained it. maybe just the cheap brand?

is a straight 40 thicker then a 10w40?