I have the same vehicle, and had the exact same problem for several months, same side of engine. Finally, my brother found a very, very, very tiny stress fracture on the TOP of the black plastic engine cover on the left-hand side (looking at the engine), near the front, down in the small curved part that runs from the front to the back of the engine cover. It was so tiny you could hardly see it, but it leaked oil everywhere for months. He sealed it up with some kind of sealer, and I have never had a problem since with leaking oil.