What was found
(CAN) DURING CLIMB PASSING 2,800, AS THE BLEEDS WERE TURNED ON, AN OIL ODOR IN THE COCKPIT. THE CREW CONTINUED THE CLIMB TO 8,000, BLEEDS WERE TURNED OFF AND THE CABIN WAS VENTILATED THROUGH RAM AIR. THE CREW ELECTED TO RETURN TO THE DEPARTURE AIRPORT WHERE AN UNEVENTFUL LANDING WAS ACCOMPLISHED. IT IS UNKNOWN AT THIS TIME FROM WHICH ENGINE THE ODOR IS COMING FROM, TROUBLESHOOTING IS ON-GOING.