Is there oil slung all over the place, as thrown from the rear edges of the cogged crank gear and damper pulley? Oil slung out from the pulleys indicate a leaky front crankshaft main seal. If not, suspect a leaking oil pump gasket, or (less likely) a leaking oil pump (possible cracked or damaged housing).
See
Leaking Front (oil pump) Cover
Oil Pump (less likely)