What was found
RED LEFT ENG. LOW OIL PRESS LIGHT AT CRUISE FL430. PRESSURE INDICATED APPROX 28 PSI, THEN WENT UP TO 35-36 PSI AND LIGHT WENT OUT. RETARDED THE LEFT THRUST LEVER TOWARDS IDLE AND LIGHT REMAINED OUT, BUT THEN CAME ON THEN BACK OFF 2 OR 3 TIMES. FINALLY IT CAME ON AND STAYED ON. SHUT ENG DOWN INFLT. MX C/A: FOUND OIL CAP REMOVED, SERVICED AND REINSTALLED. ACFT STILL IN WORK WITH STANDARD AERO EVALUATING ENGINE ALONGSIDE HONEYWELL REPS AND MX CONTROL.