416 low oil pressure at idle

I had plenty of 340,s 360,s over the last 25 plus years , and every small block at idle hot ran around 12, 13 psi .My father was aChrysler mechanic for over 20 years and he always told me it only takes 6 psi to put the light out .And right now my 340 Dart Sport runs about 10 to 13 hot , never had a problem .