What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS NOT DECLARED DUE TO: DURING CRUISE ENGINE OIL FOR LEFT ENGINE DROPPED FROM 8 TO 5 QTS AND LOW QUANTITY INDUCATION ILLUMINATED AS WELL; AIRCRAFT DIVERTED TO AND LANDED SAFELY AT ELP. OPENED UP ENINGE NUMBER 1 FOUND COWLING AND GEAR BOX COVERED IN OIL RAN NUMBER 1 ENGINE AT IDLE NOTED A STEADY OIL LEAK COMING FROM THE STARTER SPLIT LINE. REMOVED AND REPLACED NUMBER 1 ENGINE STARTER. PER AMM 80-11-01. PERFORMED IDLE LEAK CHECK AND RAN ENGINE AT POWER WITH NO LEAKS NOTED. PER AMM 71-00-00.