340 Rear Main Seal and/or Oil Pan leak

TRWRacing said
Is there any harm in driving it while keep an eye on the oil level until it gets repaired?. In 200 miles, I have not seen it move on the dipstick. I am running conventional Valvoline 10w-40 with a ZDDP additive.

I've driven cars in the past with worse leaks than that, as long as the oil level is good, it shouldn't hurt anything, other than make a mess.

Have you by chance checked for a leak up around the oil pressure sending unit back of engine right on top?