my neighboor came over earlier and he undid the bolt undeneath and we drained the oil out then i used the hose to flush the oil out and squired in some washing up liquid to clean it out then flushed it again and after a while only clean water came out. now im trying to dry the water so it doesnt rust and im using my mums hairdryer, how long do you think it will take to dry out and what oil should i put in?? thanks i took a photo also