At 20:52 central time, a Cessna 210 was damaged during a gear-up landing. The pilot and his passenger were not injured. The pilot was flying from Batesville to Fayetteville but, on approach to Fayetteville, the pilot noticed the right main gear did not appear down and locked when viewed from the wing mirror. The pilot determined the hydraulic reservoir was empty. The passenger put engine oil into the reservoir, but the gear would still not extend. The pilot elected to divert to Fort Smith, where the emergency equipment was better. The airplane landed with the nose gear extended and the main gear retracted. A mechanic who later examined the airplane said the left landing gear actuator was busted.