Time for a new gasket

[thstone]

Check to make sure that the oil isn't coming from somewhere other than the sump pan - sometimes the path that oil takes can be surprising.

Also, there isn't a true gasket on the oil sump pan, just a light coating of sealant between the two machined surfaces. Thus, when you drop the sump pan be sure to check the sump pan for any warping which may be contributing to the seepage.

If it was me, I'd refill it with oil and clean it up so make it easier to monitor. If it continues to seep or leak to the extent where its dripping, then drop the sump pan and re-seal on the next oil change.