Check your oil pan gasket. Mine was bad and it was leaking down onto the exhaust and burning up, so it didn't leave much on the ground.I have the exact same leak, but mine is somewhat more puzzling. Whether the car is running or not makes no difference in the leak, but after i've been driving for awhile,and am at a stop light or sign, I can smell some oil burning like it's dripping onto the exhaust somewhere.