Hi Scotty, thanks for your advice for my 2001, Chevy lumina (150,000) oil leak. So I took a photo last night, and I found two oil "drops" made under the oil pan (very slowly dropping, a quarter coin size amount over a night). Do you think I may have a crack or something? It seems not a head gasket issue to me, but would like to ask your advice. Thanks Scotty! :)