I changed the rubber gasket on the oil drain plug 3000 miles ago. Immediately after doing so I noticed oil leaking around the plug. So I tightened the plug. That didn't stop the leak. The other day it was time for another oil change. Ordered a new drain plug from Geno's with a new seal. Installed the new plug and seal and tonight I noticed oil leaking around the new seal and plug. Before I installed the new plug and seal I inspected the oil pan and threads and there was no visible damage. Any help will be appreciated.