FAILURE OF THE PILOT TO MAINTAIN ADEQUATE AIRSPEED, WHILE MANEUVERING FOR A PRECAUTIONARY LANDING ON A ROAD, WHICH RESULTED IN AN INADVERTENT STALL. FACTORS RELATED TO THE ACCIDENT WERE: THE PILOT'S IMPROPER REPLACEMENT OF AN OIL TEMPERATURE GAGE, AND A SUBSEQUENT OIL LEAK, WHICH RESULTED IN A LOSS OF OIL.