Hi guys, I attached a file of a picture of something on my sachs moped. I took the cover off (it's where the oil drain plug is) and let the oil drain out. Do I need to refill this compartment and if so, do I fill it with oil-fuel mixture, pure 2 cycle oil, or what? Thanks, I feel so embarassed to ask such stupid and basic questions but I really don't have a clue. Thanks.