the oil pan leaks are mostly due to people tightening them with "poori taaqat" There is a proper and dedicated process to every job.
firstly make sure the pan is flat - measure on glass, secondly do NOT use general purpose RTV - you are required to use specific engine sealant like threebond 1208, loctite 5800 etc and the bolts are tightened very lightly to about 80 inch/lbs or approximately screwdriver tight.
No leaks, just like you see that that a new corolla engine does not leak and is pretty to look at too, the mechanic overhauled engine is loaded with red RTV on every joint and still the thing leaks like a sieve.