THE PILOT REPORTED THAT HE 'RAN OUT OF FUEL,' APPROXIMATELY SIX MILES FROM HIS DESTINATION AIRPORT. HE 'TURNED THE AIRPLANE INTO THE WIND' AND ATTEMPTED A FORCED LANDING IN A PLOWED FIELD. THE PILOT SAID THAT HE HAD TAKEN OFF KNOWING THAT HE WAS 'PROBABLY STRETCHING HIS FUEL TO REACH HIS PLANNED DESTINATION.' THE PILOT DID NOT REFUEL THE AIRPLANE PRIOR TO TAKEOFF. EXAMINATION OF THE WRECKAGE SHOWED EVIDENCE INDICATIVE OF A HARD FLAT IMPACT. THERE WAS NO EVIDENCE OF FUEL AT THE ACCIDENT SITE. EXAMINATION OF THE FUEL SYSTEM SHOWED NO EVIDENCE OF FUEL PRIOR TO IMPACT.