When did your GPs begin to develop leaking?

Hi guys,
I have a 97 GTP, within last 4 or 5 months, it began to develop oil leaking. Current mileage is 137,000 KM, I think that is around 85,000 miles. Not sure is it too early for it to have this annoying leaking...
My machanic said it should be oil pan...
How about your GPs?

Well I busted the original engine and never leaked. Could be the oil pan gasket or the crank oil retainer. For that mileage and driving conditions could happen.

Do you think these 2 types of leaking will cause some potential damage to system, if I keep an eye on oil level?