depends on what motor
4 stroke leaking oil might mean it runs out of oil.
2 stroke means you have oil being added all of the time
Most of the time it is unburned fuel and oil that drips out after running, with lots of old carbon with it.
means the cylinders are not burning all of the fuel or the lower seal is leaking.
but there should not be much puddled oil/fuel sitting on that seal anyway.
might check the re circulation check valves to make sure they are functioning properly.
they are suppose to pull that up and get it out of the crankcase
look on line for Rodbolt17., and ask him maybe.
he posts on a different forum now a days