I had gotten home, hadn't noticed this, until i had to go back out. It's oily, i believe that its oil but it seems clean. I had added 2 liters of oil as i was low. I need to get it to the shop, but afraid to move it. After adding the oil, i started it. Looking underneath, i really don't see anything leaking. I had place a cardboard underneath over night, maybe a two inch puddle, but that could've been caused by the prior incident. Could my going in reverse done this? I know sounds crazy to ask. I am not a mechanic, as you can tell by now. Any thoughts on this?