What was found
MY NORMAL CROSS CHECK IDENTIFIED A DISPARITY IN #1 AND #2 ENGINE OIL TEMPERATURE OF APPROXIMATELY 12 DEGREES C AFTER ABOUT 5 MINUTES OF FLIGHT AT CRUISE. ABOUT 12 MILES SOUTH OF THE CITY OF LAS CRUCES, NM I NOTICED THE #2 OIL TEMP CLIMB ACCELERATE SO I REDUCED POWER TO VH HOPING THAT WOULD COOL THE ENGINE A BIT. I SIMULTANEOUSLY MADE A RIGHT TURN TOWARD LAS CRUCES AIRPORT TO EXECUTE A PRECAUTIONARY LANDING. REDUCED POWER DID NOT HALT THE OIL TEMPERATURE CLIMB SO WHEN IT HIT THE OIL TEMP LIMIT THEN I PLACED #2 ENGINE INTO IDLE. #1 ENGINE TOOK UP THE LOAD NICELY AND PROVIDED SUFFICIENT POWER TO KEEP THE AIRCRAFT AIRBORNE THE 12 MILES BACK TO THE AIRPORT. #2 OIL TEMPERATURE DID DROP SIGNIFICANTLY SO I DECIDED TO KEEP THE ENGINE OPERATING AT IDLE IN ORDER TO UTILIZE IT UPON LANDING SINCE WE WERE STILL VERY HEAVY. EVERYTHING LOOKED GOOD ON FINAL APPROACH SO AT 50 KTS AND 50 FEET ABOVE THE RUNWAY I PLACED THE #2 ENGINE BACK TO FLY AND LANDED THE AIRCRAFT NORMALLY WITH NO FURTHER INCIDENT.