Leaky cauldron

I recently noticed that some oil had collected below my car’s front bumper on the driver’s side. I took the car to the dealership to get it inspected, and according to them, the spill may have just been water from the air-conditioner. I haven’t seen a leakage since. What could have caused this? The spillage on my driveway clearly shows that oil has drained out from somewhere.  

 

 

AAA It is not unusual for the air-conditioner drain pipe, which 

is situated on the floorpan, to release water when the air-con is switched on, and the flow of water depends on the humidity or weather conditions prevailing at that time. If the leakage is oil-based, then the stain will remain and not evaporate. If it is definitely oil, the car needs to be thoroughly inspected by the dealer, as a loose drain plug from the oil sump or any other oil leak can lead to engine damage.