Another thought:

Check the oil level after the car has rested overnight. With so little mileage and conventional motor oil, the oil passages in the head may be blocked somewhat, and the oil will not easily flow back to the sump. This was the case on the poorly maintained car I bought, I also thought it was drinking oil on a 1/2 hour run. The next morning, the sump was over full. I cleaned the engine using synthetic + 1 quart of ATF for a tank full off gasoline, then flushed and filled with synthetic.