Mmine too had that ocasional oil smell and a leak and a small leak around the oil filler housing. Looked like someone missed filling, but I knew that was not the case as the area was cleaned, but oil returned. Took it to the dealer who replaced the oil filler housing, but leak was still there. They next resealed the oil filler housing to the valve cover, and the leak and smell has gone away. Was ever so small but the smell was there. Good now.