What was found
UPON CLIMBING THROUGH APROX 2500', RECEIVED A E2 OIL LOW PRESSURE CAS MESSAGE. ADVISED NEEDED TO RETURN TO AIRPORT. ABOUT A MINUTE LATER DETECTED A BURNING ODOR WHICH WAS SHORTLY FOLLOWED BY SMOKE FILLING THE CABIN. DECLARED AN EMERGENCY & ADVISED RETURNING. RAN SMOKE EVACUATION QRC AFTER DONNING MASKS & GOGGLES ON A BASE LEG AND LANDING MOMENTARILY. CONFIGURED ACFT FOR LANDING & LANDED SAFELY. NOTICED A CONSIDERABLE AMOUNT OF SMOKE IN CABIN. FIRE DEPARTMENT USED HEAT SENSORS & DETECTED NO FIRES OR ANYTHING ABNORMAL. NOTED ON THE WALK AROUND THAT THERE WAS OIL DRIPPING OUT OF EXHAUST END OF THE ENG. CHECKED OIL DOOR & SAW THE OIL CAP WAS SECURED WITH VERY LITTLE TO NO OIL SHOWN IN SIGHT GAUGE. BORESCOPED RH ENGINE AND FOUND OIL AT FIRST STAGE SEAL INSIDE OF THE ENGINE. ENGINE REPLACEMENT PERFORMED BY EASW.